We know it's quite the thing to be fashionably late when you're a big star like Katy Perry, but the US star might want to invest in a new watch after feeling the wrath of fashionistas who she kept waiting at Milan Fashion Week.
After reportedly rocking up to her friend Jeremy Scott's first collection for Moschino 50 minutes late, the 'Roar' singer was greeted by a chorus of boos from the crowd as she posed for photos on the catwalk.
Awks.
Katy Perry
And how did Katy respond? By telling everyone to 'shut the f*** up' of course!
Watch the video above to see it all kick off...
Katy Perry
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Pop star Katy Perry skips rope as she performs for a morning TV news program in Sydney, Tuesday, Oct. 29, 2013. Perry performed to support her new album "PRISM". (AP Photo/Rick Rycroft) (credit:AP)
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In this handout provided by Kitty Purry Inc, Katy Perry performs at her iHeartRadio "Prism" album release party at the new iHeartRadio Theatre on Tuesday, Oct. 22, 2013, in Burbank, Calif. (Photo by John Shearer/Invision for Kitty Purry Inc./AP Images) (credit:AP)
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Katy Perry during the filming of the Graham Norton Show at the London Studios London. (credit:PA)
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Katy Perry poses as she arrives to attend the presentation of Chanel's ready-to-wear Spring/Summer 2014 fashion collection, presented Tuesday, Oct. 1, 2013 in Paris. (AP Photo/Jacques Brinon) (credit:AP)
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Katy Perry attending the iHeart Radio Music Festival in Las Vegas, Nevada. (credit:PA)
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US singer Katy Perry poses for photographers with a body care product during a public relations event at a perfumery in Berlin, Germany, Wednesday, Sept. 25, 2013. (AP Photo/Michael Sohn) (credit:AP)
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Katy Perry arrives at the MTV Video Music Awards on Sunday, Aug. 25, 2013, at the Barclays Center in the Brooklyn borough of New York. (Photo by Scott Gries/Invision/AP) (credit:AP)
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FILE - This July 28, 2013 file photo shows singer Katy Perry at the world premiere of "The Smurfs 2" in Los Angeles. MTV announced Monday, Aug. 12, that will perform her newly released single "Roar," during the 2013 "MTV Video Music Awards." The 2013 MTV Video Music Awards will air live on Aug. 25, at 9:00 p.m. EST. (Photo by Jordan Strauss/Invision/AP, File) (credit:AP)
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Katy Perry attends the 2013 Delete Blood Cancer Gala on Wednesday, May 1, 2013 in New York. (Photo by Charles Sykes/Invision/AP) (credit:AP)
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Singer Katy Perry attends the White House Correspondents' Dinner at the Washington Hilton on Saturday April 27, 2013 in Washington. (Photo by Evan Agostini/Invision/AP) (credit:AP)
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Katy Perry poses for photos at the Summer of Sony 5 Edition photo call, to promote her upcoming film "Smurfs 2," in Cancun, Mexico, Monday, April 22, 2013.(AP Photo/Israel Leal) (credit:AP)
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Singer Katy Perry arrives at the 26th annual Nickelodeon's Kids' Choice Awards on Saturday, March 23, 2013, in Los Angeles. (Photo by Todd Williamson/Invision/AP) (credit:AP)
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Katy Perry arrives at the 55th annual Grammy Awards on Sunday, Feb. 10, 2013, in Los Angeles. (Photo by Jordan Strauss/Invision/AP) (credit:AP)
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Singer Katy Perry arrives at the Clive Davis Pre-GRAMMY Gala on Saturday, Feb. 9, 2013 in Beverly Hills, Calif. (Photo by John Shearer/Invision/AP) (credit:AP)
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Katy Perry arrives at the MusiCares Person of the Year tribute honoring Bruce Springsteen at the Los Angeles Convention Center on Friday Feb. 8, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
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Katy Perry performs during the Kids' Inaugural: Our Children. Our Future." event in Washington, Saturday, Jan. 19, 2013. (AP Photo/Gerald Herbert) (credit:AP)
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FILE - In this Dec. 2, 2012 file photo, Katy Perry arrives at Trevor Live at the Hollywood Palladium, in Los Angeles. Kelly Clarkson and fun. are just two of the acts who will perform during the upcoming inaugural festivities, which also includes Beyonce, James Taylor, Stevie Wonder, Katy Perry and dozens of others. (Photo by Jordan Strauss/Invision/AP, File) (credit:AP)
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Katy Perry accepts the award for favorite pop artist at the Peoples Choice Awards at the Nokia Theatre on Wednesday Jan. 9, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
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Guest performer Katy Perry poses at A Celebration of Carole King and her Music at The Dolby Theatre on Tuesday, Dec. 4, 2012, in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
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Katy Perry arrives at Trevor Live at the Hollywood Palladium on Sunday, Dec. 2, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP) (credit:AP)
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"Woman of the Year" honoree, singer Katy Perry, attends Billboard's "Women in Music 2012" luncheon at Capitale on Friday Nov. 30, 2012 in New York. (Photo by Evan Agostini/Invision/AP) (credit:AP)
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Singer Katy Perry attends the 8th Annual UNICEF Snowflake Ball at Cipriani 42nd Street on Tuesday Nov. 27, 2012 in New York. (Photo by Evan Agostini/Invision/AP) (credit:AP)
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Singer Katy Perry receives an "I Voted" sticker at a polling place in Los Angeles on Tuesday, Nov. 6, 2012. (Photo by John Shearer/Invision/AP) (credit:AP)
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Katy Perry performs before President Barack Obama arrives at a campaign event Saturday, Nov. 3, 2012, in Milwaukee. (AP Photo/Morry Gash) (credit:AP)
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Singer Katy Perry performs for a crowd before the arrival of President Barack Obama at a campaign rally, Wednesday, Oct. 24, 2012, in Las Vegas. (AP Photo/Julie Jacobson) (credit:AP)
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FILE - This Oct. 13, 2012 photo released by Starpix shows Katy Perry at Comedy Central's Night Of Too Many Stars: America Comes Together For Autism Programs at The Beacon Theatre in New York. Perry, Quincy Jones, Alicia Keys and Vince Gill will perform at an event to benefit the late Paul Newman's The Painted Turtle Camp. (AP Photo/Starpix, Andrew Toth, file) (credit:AP)
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Singer Katy Perry attends the 4th Annual Los Angeles Haunted Hayride VIP Premiere Night held at Griffith Park on Sunday Oct. 7, 2012, in Los Angeles. (Photo by John Shearer/Invision for LAHH/AP Images) (credit:AP)
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American singer Katy Perry performs during a concert on the sidelines of the Singapore Formula One Grand Prix race on Sunday Sept. 23, 2012, in Singapore.(AP Photo/Joseph Nair) (credit:AP)
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US singer Katy Perry performs during a concert on the sidelines of the Singapore Formula One Grand Prix race on Sunday Sept. 23, 2012 in Singapore.(AP Photo/Joseph Nair) (credit:AP)
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U.S. singer and actress Katy Perry poses for photos during the red carpet of her movie "Part of me 3D" premiere in Rio de Janeiro, Brazil, Monday July 30, 2012. (AP Photo/Felipe Dana) (credit:AP)
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U.S. singer and actress Katy Perry poses for photos during a photo call to promote her movie "Part of me 3D" in Rio de Janeiro, Brazil, Monday July 30, 2012. (AP Photo/Felipe Dana) (credit:AP)
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FILE - In this May 23, 2012 file photo released by Starpix, singer Katy Perry wears a patriotic dress as she performs at a Pepsi-sponsored event at Brooklyn Pier 9A, kicking off Fleet Week in New York. Perry's "Wide Awake," was the top downloaded song on iTunes for the week ending July 9, 2012. (AP Photo/Starpix, Amanda Schwab, file) (credit:AP)
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FILE - This July 3, 2012 file photo shows U.S. singer Katy Perry at the European Premiere of her film "Part of Me" in London. Perry is the new celebrity endorser for the snack brand Popchips. According to a company statement released Wednesday, July 25, 2012 the pop star has become an investor and representative for the chips. (AP Photo/Joel Ryan, File) (credit:AP)
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U.S singer Katy Perry arrives with a union Jack umbrella on the red carpet at a central London cinema for the European Premiere of her film, 'Part of Me', Tuesday, July 3, 2012. (AP Photo/Joel Ryan) (credit:AP)
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Katy Perry attends the premiere of "Katy Perry: Part of Me" at Grauman's Chinese Theatre on Tuesday, June 26, 2012 in Los Angeles. (Photo by John Shearer/Invision/AP) (credit:AP)
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FILE - This May 20, 2012 file photo shows singer Katy Perry arriving at the 2012 Billboard Awards at the MGM Grand in Las Vegas, Nev. The pop star's energetic Day-Glo performances and chart success _ tying Michael Jackson's "Bad" with five No. 1 singles from her album "Teenage Dream" _ are undercut by heartbreak in her new 3D concert film "Katy Perry: Part of Me." She sobs uncontrollably backstage as her marriage to Russell Brand falls apart during her world tour, and talks about her dashed desire for "fairy tale" romance. The film opens nationwide on July 5. (Photo by John Shearer/Invision/AP) (credit:AP)
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Katy Perry waves after receiving her award for Best International Video during the 2012 Much Music Video Awards in Toronto on Sunday, June 17, 2012. (AP Photo/The Canadian Press, Chris Young) (credit:AP)
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Katy Perry arrives on the red carpet during the 2012 Much Music Video Awards in Toronto on Sunday, June 17, 2012. (AP Photo/The Canadian Press, Nathan Denette) (credit:AP)
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Singer Katy Perry poses at the 2012 Spirit of Life Award Gala on Tuesday June 12, 2012 in Los Angeles. (Photo by Chris Pizzello/Invision/AP) (credit:AP)
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Katy Perry during filming of the Graham Norton show at the London Studios, London. PRESS ASSOCIATION Photo. Picture date: Thursday June 7, 2012. Photo credit should read: Ian West/PA Wire (credit:PA)
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Katy Perry performs at Nickelodeon's 25th Annual Kids' Choice Awards on Saturday, March 31, 2012 in Los Angeles. (AP Photo/Chris Pizzello) (credit:AP)
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Katy Perry arrives at Nickelodeon's 25th Annual Kids' Choice Awards on Saturday, March 31, 2012 in Los Angeles. (AP Photo/Jason Redmond) (credit:AP)
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US singer Katy Perry arrives for the show by designer Viktor & Rolf as part of the Fall-Winter, ready-to-wear 2013 fashion collection, during Paris Fashion week, Saturday, March 3, 2012. (AP Photo/Zacharie Scheurer) (credit:AP)
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U.S singer Katy Perry arrives to Chanel fashion house presentation for Women's Fall-Winter, ready-to-wear 2013 fashion collection, during Paris Fashion week, Tuesday, March 6, 2012. (AP Photo/Thibault Camus) (credit:AP)
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Katy Perry arrives at the Elton John AIDS Foundation Academy Awards viewing party in West Hollywood, Calif. on Sunday, Feb. 26, 2012. (AP Photo/Dan Steinberg) (credit:AP)
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Katy Perry arrives at the 54th annual Grammy Awards on Sunday, Feb. 12, 2012 in Los Angeles. (AP Photo/Chris Pizzello) (credit:AP)
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Katy Perry presents an award during the inaugural NFL Honors show Saturday, Feb. 4, 2012, in Indianapolis.The New York Giants will face the New England Patriots in the NFL football's Super Bowl XLVI in Indianapolis on Feb. 5. (AP Photo/Marcio Sanchez) (credit:AP)
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FILE - In this Sept. 27, 2011 file photo, Katy Perry performs in concert at the Pepsi Music festival in Buenos Aires, Argentina. (AP Photo/Victor R. Caivano, file) (credit:AP)
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Katy Perry arrives at the 39th Annual American Music Awards on Sunday, Nov. 20, 2011 in Los Angeles. (AP Photo/Chris Pizzello) (credit:AP)
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Winner of the Best Live award Katy Perry reacts at the MTV European Music Awards 2011, in Belfast, Northern Ireland Sunday, Nov. 6, 2011. (AP Photo/Joel Ryan) (credit:AP)
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U.S. singer Katy Perry, left, arrives at a central London Theatre, Monday, Oct. 17, 2011. (AP Photo/Jonathan Short) (credit:AP)
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FILE - In this Aug. 28, 2011 file photo, singer Katy Perry accepts the award for video of the year for "Firework" at the MTV Video Music Awards in Los Angeles. Perry is part of a group of contemporary pop singers who are finding success defying the conventional definition of sexiness with oddball tactics and wacky outfits. (AP Photo/Matt Sayles, file) (credit:AP)
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Katy Perry poses backstage at the MTV Video Music Awards on Sunday Aug. 28, 2011, in Los Angeles.(AP Photo/Chris Pizzello) (credit:AP)
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Katy Perry arrives at the MTV Video Music Awards on Sunday Aug. 28, 2011, in Los Angeles. (AP Photo/Matt Sayles) (credit:AP)
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FILE - In this July 24, 2011 file photo, singer Katy Perry poses with a Smurf character at the premiere of "The Smurfs" at the Ziegfeld Theatre, in New York. Daniel Craig and Harrison Ford's sci-fi Western "Cowboys & Aliens" and the family adventure "The Smurfs" both opened with $36.2 million, according to studio estimates Sunday, July 31, 2011. (AP Photo/Evan Agostini, File) (credit:AP)
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Singer Katy Perry attends the premiere of "The Smurfs" at the Ziegfeld Theatre on Sunday, July 24, 2011 in New York. (AP Photo/Evan Agostini) (credit:AP)
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Pop star Katy Perry promotes her debut fragrance Purr in Toronto on Thursday June 30, 2011. The perfume will be sold solely by Sears in Canada. (AP Photo/The Canadian Press, Chris Young) (credit:AP)
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FILE - In this Nov. 30, 2010 file photo, singer Katy Perry performs during the Grammy Nominations Concert in Los Angeles. Perry has postponed concerts in St. Paul, Minn., and the Chicago area because she's suffering from food poisoning. A statement released by her publicist says the Friday, July 8, 2011 show at Allstate Arena in Rosemont, Ill., has been rescheduled to Aug. 21 and her Saturday show at St. Paul's Xcel Energy Center is now set for Aug. 23. (AP Photo/Matt Sayles, File) (credit:AP)
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Us singer Katy Perry speaks to the press during the presentation of her new perfume "Purr" in Mexico City, Saturday, Feb. 5, 2011.(AP Photo/Marco Ugarte) (credit:AP)
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Singer Katy Perry attends the 2nd annual 'Change Begins Within' benefit celebration, hosted by the David Lynch Foundation at the Metropolitan Museum of Art on Monday, Dec. 13, 2010 in New York. (AP Photo/Evan Agostini) (credit:AP)
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Katy Perry arrives at the MTV Video Music Awards on Sunday, Sept. 12, 2010 in Los Angeles. (AP Photo/Chris Pizzello) (credit:AP)
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In this July 23, 2010 photo, singer Katy Perry poses for a portrait in New York. (AP Photo/Victoria Will) (credit:AP)
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US singer Katy Perry performs during the MTV World Stage Live in Malaysia 2010 in Petaling Jaya, near Kuala Lumpur, Malaysia, Saturday, July 31, 2010. (AP Photo/Lai Seng Sin, Pool) (credit:AP)
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American singer Katy Perry poses during a press conference in Petaling Jaya, near Kuala Lumpur, Malaysia, Saturday, July 31, 2010. Malaysia will host the MTV World Stage Live in Malaysia 2010 on Saturday night. (AP Photo/Lai Seng Sin) (credit:AP)
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FILE - In this June 15, 2010 file photo, singer Katy Perry performs in New York's Times Square at the launch of the Volkswagen 2011 Jetta. (AP Photo/Mark Lennihan, file) (credit:AP)
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Katy Perry is seen backstage at the MTV Movie Awards in Universal City, Calif., on Sunday, June 6, 2010. (AP Photo/Chris Pizzello) (credit:AP)
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Katy Perry arrives at the Metropolitan Museum of Art Costume Institute gala, Monday, May 3, 2010 in New York. (AP Photo/Evan Agostini) (credit:AP)
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Katy Perry, left, and Russell Brand arrive at the Vanity Fair Oscar party on Sunday, March 7, 2010, in West Hollywood, Calif. (AP Photo/Peter Kramer) (credit:AP)
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Katy Perry performs on stage at the Shepherds Bush Empire, London (credit:PA)
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Katy Perry performs on stage at the Shepherds Bush Empire, London (credit:PA)
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Katy Perry performs on stage during Capital 95.8 Summertime Ball with Barclaycard at the Emirates Stadium. (credit:PA)
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Katy Perry arriving at the Model as Muse, Embodying Fashion, Costume Institute Gala, the Metropolitan Museum, New York, USA (credit:PA)
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Grammy Nominated Katy Perry is presented with a Special Case dedicated to her in honour of her Grammmy nomination at the Hard Rock Hotel and Casino, Las Vegas. (credit:PA)
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Katy Perry arriving at the Brit Awards 2009, Earls Court, London. (credit:PA)
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Katy Perry attends the NRJ Music Awards 2009 held at the Palais des Festivals, Cannes. (credit:PA)
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Katy Perry on stage during the 2008 MTV Europe Music Video Awards at the Echo Arena, Liverpool. (credit:PA)
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Katy Perry on stage during the 2008 MTV Europe Music Video Awards at the Echo Arena, Liverpool. (credit:PA)
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Katy Perry arrives for the 2008 MTV Europe Music Video Awards at the Echo Arena, Liverpool. (credit:PA)
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Katy Perry during a press conference ahead of tomorrow's MTV Europe Music Video Awards 2008, St George's Hall in Liverpool. (credit:PA)
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Katy Perry arrives for the 2008 MTV Video Music Awards at Paramount Studios in Hollywood, Los Angeles. (credit:PA)
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This Sept. 20, 2013 photo shows Katy Perry performing at the iHeartRadio Music Festival in Las Vegas, Nev. (Photo by Al Powers/Powers Imagery/Invision/AP) (credit:AP)
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IMAGE DISTRIBUTED FOR CAPITOL RECORDS - Katy Perry arrives at Z100 for the world premiere of her new single "Roar", on Monday, Aug. 12, 2013 in New York City. (Photo by Scott Gries/Invision for Capitol Records/AP Images) (credit:AP)