"This Is It" Premiere

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Katy Perry

Singer Katy Perry arrives to the premiere of Michael Jackson's "This Is It" on Tuesday, Oct. 27, 2009, in Los Angeles. (AP Photo/Matt Sayles)

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Katy Perry Gets ... Perry flashes her engagement ring from comedian Russell Brand.(AP Photo/Chris Pizzello)
Grammy Nominatio... Katy Perry is seen backstage at the Grammy Nominations Concert on Wednesday, Dec. 2, 2009, in Los Angeles. (AP Photo/Matt Sayles)
Grammy Awards Katy Perry backstage at the 51st Annual Grammy Awards on Sunday, Feb. 8, 2009, in Los Angeles.(AP Photo/Matt Sayles)
MTV Video Music ... Katy Perry arrives at the MTV Video Music Awards on Sunday, Sept. 13, 2009 in New York. (AP Photo/Charles Sykes)
Blender Magazine... Singer Katy Perry poses at a party thrown for Perry by Blender Magazine in Los Angeles on Saturday, Sept. 6, 2008. (AP Photo/Dan Steinberg)
2009 MTV Europea... U.S. singer Katy Perry arrives at the 2009 MTV European Music Awards in Berlin, Thursday Nov. 5, 2009. (AP Photo/Joel Ryan)
Katy Perry U.S. singer Katy Perry onstage at the 2008 European MTV Awards in Liverpool, England, Thursday, Nov. 6, 2008. (AP Photo/Joel Ryan)
Behold II Launch... Singer Katy Perry arrives at the Samsung Behold II Launch party in Los Angeles on Wednesday, Nov. 18, 2009. (AP Photo/Dan Steinberg)
Fashion's Night ... Singer Katy Perry attends Fashion's Night Out at the Stella McCartney shop in New York, Thursday, Sept. 10, 2009. (AP Photo/Charles Sykes)
Clive Davis Pre-... Katy Perry arrives at the Clive Davis pre-Grammy party in Beverly Hills, Calif. on Saturday, Feb. 7, 2009. (AP Photo/Matt Sayles)
Marcus Molinari'... Singer Katy Perry arrives at fashion designer Marcus Molinari's birthday party at h.wood in Los Angeles on Wednesday, May 20, 2009. (AP Photo/Dan Steinberg)
Funny Girl Katy Perry walks through the Tuileries Gardens in paris as she leaves following the presentation of French fashion house Christian Dior's spring-summer 2009 ready-to-wear collection, Monday, Sept. 29, 2008.(AP Photo/Thibault Camus)
"This Is It" Pre... Singer Katy Perry arrives to the premiere of Michael Jackson's "This Is It" on Tuesday, Oct. 27, 2009, in Los Angeles. (AP Photo/Matt Sayles)
Katy Perry Katy Perry arrives at the 51st Annual Grammy Awards on Sunday, Feb. 8, 2009, in Los Angeles. (AP Photo/Chris Pizzello)
Katy Perry in Be... Host Katy Perry speaks on stage during the 2009 MTV Europe Music Awards held at the O2 Arena on November 5, 2009 in Berlin, Germany. (Photo by Dave M. Benett/Getty Images)
Paris Womenswear... Katie Perry poses backstage during the Louis Vuitton Pret a Porter show as part of the Paris Womenswear Fashion Week Spring/Summer 2010 at Cour Carree du Louvre on October 7, 2009 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)