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

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...

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  • Katy Perry

    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)

  • Katy Perry

    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)

  • The Graham Norton Show - London

    Katy Perry during the filming of the Graham Norton Show at the London Studios London.

  • Katy Perry

    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)

  • iHeart Radio Music Festival 2013 - Las Vegas

    Katy Perry attending the iHeart Radio Music Festival in Las Vegas, Nevada.

  • 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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry attends the 2013 Delete Blood Cancer Gala on Wednesday, May 1, 2013 in New York. (Photo by Charles Sykes/Invision/AP)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry arrives at the 55th annual Grammy Awards on Sunday, Feb. 10, 2013, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry performs during the Kids' Inaugural: Our Children. Our Future." event in Washington, Saturday, Jan. 19, 2013. (AP Photo/Gerald Herbert)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry accepts the award for favorite pop artist at the People’s Choice Awards at the Nokia Theatre on Wednesday Jan. 9, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry arrives at Trevor Live at the Hollywood Palladium on Sunday, Dec. 2, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)

  • Katy Perry

    "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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry performs before President Barack Obama arrives at a campaign event Saturday, Nov. 3, 2012, in Milwaukee. (AP Photo/Morry Gash)

  • Katy Perry

    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)

  • Comedy Central's Night Of Too Many Stars: America Comes Together For Autism Programs

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • 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)

  • 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)

  • `Katy Perry: Part of Me` Performance for Pepsi`s Fleet Week

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • The Graham Norton show

    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

  • Katy Perry

    Katy Perry performs at Nickelodeon's 25th Annual Kids' Choice Awards on Saturday, March 31, 2012 in Los Angeles. (AP Photo/Chris Pizzello)

  • Katy Perry

    Katy Perry arrives at Nickelodeon's 25th Annual Kids' Choice Awards on Saturday, March 31, 2012 in Los Angeles. (AP Photo/Jason Redmond)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry arrives at the 54th annual Grammy Awards on Sunday, Feb. 12, 2012 in Los Angeles. (AP Photo/Chris Pizzello)

  • 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)

  • Katy Perry

    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)

  • Katy Perry

    Katy Perry arrives at the 39th Annual American Music Awards on Sunday, Nov. 20, 2011 in Los Angeles. (AP Photo/Chris Pizzello)

  • 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)

  • Katy Perry

    U.S. singer Katy Perry, left, arrives at a central London Theatre, Monday, Oct. 17, 2011. (AP Photo/Jonathan Short)

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