Katy Perry may be getting ready for a nasty legal battle.

The 'Firework' singer is reportedly caught up in a multi-million dollar lawsuit with haircare brand GHD.

TMZ reports that Jemella Group, the company behind GHD, have asked courts to block Katy Perry's team from filing a lawsuit, after the singer claimed she was owed $2million.

Katy earned $4.5million as an ambassador for the brand when she signed up to front their campaigns in 2011.

Find out more in the video above.

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  • Style Evolution: Katy Perry

    February 4, 2008. Attending the Betsey Johnson 2008 fashion show during Mercedes-Benz Fashion Week Fall 2008 at The Tent at Bryant Park.

  • Style Evolution: Katy Perry

    February 10, 2008. Musician Katy Perry attends the EMI party at Dominick's.

  • Style Evolution: Katy Perry

    May 17, 2008. Katy posing in the press room during Z100's Zootopia at the IZOD Center in East Rutherford.

  • Style Evolution: Katy Perry

    June 9, 2008. MTV's "TRL" at MTV Studios in New York.

  • Style Evolution: Katy Perry

    June 14, 2008. Recording artist/actress Katy Perry attends designer Kira Plastinina's United States Launch Party in Los Angeles, California.

  • Style Evolution: Katy Perry

    June 18, 2008. Katy Perry during the taping of MTV's 'FNMTV' in Hollywood, CA. The show airs Fridays at 8pm on MTV.

  • Style Evolution: Katy Perry

    July 10, 2008. Katy Perry backstage during the taping of MTV's 'FNMTV' in Hollywood, CA. The show airs Fridays at 8pm on MTV.

  • Style Evolution: Katy Perry

    June 17, 2008. Katy Perry attends the record release party for "One of the Boys" at Capitol Records on in Los Angeles, California.

  • Style Evolution: Katy Perry

    July 26, 2008. Singer Katy Perry hosts Travis McCoy's birthday celebration at Country Club in New York City.

  • Style Evolution: Katy Perry

    29 October 2003. Katy seen at the Mercedes-Benz Shows LA Fashion Week Spring 2004 -Miller Girl by Nicole Miller Backstage and Front Row.

  • Style Evolution: Katy Perry

    07 June 2006. NYLON Celebrates Its Annual Music Issue With MySpace.com

  • Style Evolution: Katy Perry

  • Style Evolution: Katy Perry

    September 7, 2008. Katy Perry arrives at the 2008 MTV Video Music Awards at Paramount Pictures Studios in Los Angeles, California.

  • Style Evolution: Katy Perry

    September 17, 2008. Attending the Katy Perry Concert at Fritzclub at the Postbahnhof.

  • Style Evolution: Katy Perry

    September 29, 2008. Katy Perry arrives at the Patrick Demarchelier's exhibition Party in Paris.

  • Style Evolution: Katy Perry

    14 November 2004. Katy Perry wearing Andrew Gn Spring 2005 Collection.

  • Style Evolution: Katy Perry

    11 February 2007. Inside the EMI Post GRAMMY Party.

  • Style Evolution: Katy Perry

    05 May 2005. At the H.D. Buttercup Inaugural Celebrity Treasure Hunt for Charity and Cinco de Mayo after Party.

  • Style Evolution: Katy Perry

    20 April 2006. Vanity Fair Presents the 2006 Svedka Erotica Reading Series.

  • Style Evolution: Katy Perry

    13th January 2006. Korn "See You on the Other Side" Tour Launch Party at Hollywood Forever Cemetery.

  • Style Evolution: Katy Perry

    Nintendo DS Pre - Launch Party at The Day After - Arrivals.

  • Style Evolution: Katy Perry

    15 September 2004. Enchanted Garden Party' for Sass & Bide's Spring/Summer 2005 Collection.

  • Style Evolution: Katy Perry

    January 8, 2009. Katy arrives at VH1's 14th Annual Critics' Choice Awards held at the Santa Monica Civic Auditorium in Santa Monica.

  • Style Evolution: Katy Perry

    23 February 2004. Katy Perry at Jimmy Choo Oscar Suite.

  • Style Evolution: Katy Perry

    January 17, 2009. Singer Katy Perry attends the NRJ Music Awards 2009 held at the Palais des Festivals in Cannes.

  • Style Evolution: Katy Perry

    May 4, 2009. Katy attends "The Model as Muse: Embodying Fashion" Costume Institute Gala at The Metropolitan Museum of Art in New York City.

  • Style Evolution: Katy Perry

    November 5, 2009. Katy Perry poses for a picture backstage during the 2009 MTV Europe Music Awards held at the O2 Arena in Berlin.

  • Style Evolution: Katy Perry

    June 6th, 2010. In Universal City, California.

  • Style Evolution: Katy Perry

    March 27th, 2010. Katy Perry attends Perez Hilton's 'Carn-Evil' Theatrical Freak and Funk 32nd birthday party at Paramount Studios in Los Angeles.

  • Style Evolution: Katy Perry

    June 7, 2009. in London, England.

  • Style Evolution: Katy Perry

    1st December 2004. Katy Perry during Chandon at Hollywould Dress Launch Party at Sax Fifth Avenue Beverly Hills in Beverly Hills.

  • Style Evolution: Katy Perry

    22nd May 2005. Katy Perry during Lush SWAG-Fest 2: Denim, Diamonds and a Do at Lush Beauty Boutique in Beverly Hills.

  • Style Evolution: Katy Perry

    August 28, 2011. Katy Perry arrives at the 4th Annual House of Hype Music Awards at SLS Hotel in Beverly Hills.

  • Style Evolution: Katy Perry

    16th November 2006. Nintendo Launches Wii, The Revolutionary Home Video Game Console.