Singer Katy Perry arrives on the red carpet for the 2010 American Music Awards at the Nokia Theatre in Los Angeles on Nov. 21, 2010. (Mark Ralston/AFP/Getty Images)
Singer Katy Perry arrives on the red carpet for the 2010 American Music Awards at the Nokia Theatre in Los Angeles on Nov. 21, 2010. (Mark Ralston/AFP/Getty Images)
Katy Perry begins her performance (Matt Sayles/AP)
Singer Katy Perry performs “Firework” at the 2010 American Music Awards. (Mario Anzuoni/Reuters)
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Katy Perry performs at the 38th Annual American Music Awards. (Matt Sayles/AP)
Katy Perry performs at the 38th Annual American Music Awards. (Matt Sayles/AP)
Singer Katy Perry performs “Firework” at the 2010 American Music Awards. (Mario Anzuoni/Reuters)
Katy Perry performs at the 38th Annual American Music Awards. (Matt Sayles/AP)
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Katy Perry performs at the 38th Annual American Music Awards. (Matt Sayles/AP)
Katy Perry performs at the 38th Annual American Music Awards. (Matt Sayles/AP)
Katy Perry performs at the 38th Annual American Music Awards. (Matt Sayles/AP)
Singer Katy Perry arrives at the 2010 American Music Awards. (Danny Moloshok/Reuters)
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Katy Perry arrives at the 38th Annual American Music Awards. (Chris Pizzello/AP)
Katy Perry arrives at the 38th Annual American Music Awards. (Chris Pizzello/AP)
Katy Perry arrives at the 38th Annual American Music Awards. (Chris Pizzello/AP)
Singer Katy Perry arrives at the 2010 American Music Awards. (Danny Moloshok/Reuters)
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Singer Katy Perry performs during the Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Avenue Armory on Nov. 10, 2010, in New York City. (Theo Wargo/Getty Images)
Singer Katy Perry performs during the Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
Katy Perry sings during the Victoria’s Secret Fashon Show in New York on Nov. 10, 2010. (Seth Wenig/AP)
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Katy Perry performs during Victoria’s Secret Fashion Show in New York on Nov. 10, 2010. (Seth Wenig/AP)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Avenue Armory on Nov. 10, 2010, in New York City. (Theo Wargo/Getty Images)
Singer Katy Perry appears on stage with models at the end of the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
Singer Katy Perry performs during the Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
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Singer Katy Perry appears on stage with models at the end of the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
U.S. singer Katy Perry poses for the photographers during the launch of her fragrance in a central London’s department store on Nov. 12, 2010. (Lefteris Pitarakis/AP)
Singer Katy Perry performs during the Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
Singer Katy Perry appears on stage with models at the end of the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
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Singer Katy Perry appears on stage with models at the end of the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
Singer Katy Perry performs during the Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
Katy Perry performs during Victoria’s Secret Fashion Show in New York on Nov. 10, 2010. (Seth Wenig/AP)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
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Singer Katy Perry performs during the Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
Singer Katy Perry arrives at the 2010 Victoria’s Secret Fashion Show on Nov. 10, 2010, at the Lexington Armory in New York. (Stan Honda/AFP/Getty Images)
Singer Katy Perry performs during the Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
Katy Perry arrives for the 2010 Victoria’s Secret Fashion Show at the Lexington Avenue Armory on Nov. 10, 2010, in New York City. (Stephen Lovekin/Getty Images)
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Singers Katy Perry, left, and Akon, right, wave in front of Victoria’s Secret models after the 2010 Victoria’s Secret Fashion Show in New York on Nov. 10, 2010. (Lucas Jackson/Reuters)
Singer Katy Perry arrives to the 2010 Victoria’s Secret Fashion show in New York on Nov. 10, 2010. (Peter Kramer/AP)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
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Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Avenue Armory on Nov. 10, 2010, in New York City. (Theo Wargo/Getty Images)
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Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Armory in New York on Nov. 10, 2010. (Timothy A. Clary/AFP/Getty Images)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Avenue Armory on Nov. 10, 2010, in New York City. (Theo Wargo/Getty Images)
Singer Katy Perry arrives for the 2010 Victoria’s Secret fashion show in New York on Nov. 10, 2010. (Mike Segar/Reuters)
Singer Katy Perry performs during the 2010 Victoria’s Secret Fashion Show at the Lexington Avenue Armory on Nov. 10, 2010, in New York City. (Theo Wargo/Getty Images)
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Singer Katy Perry arrives for the 2010 Victoria’s Secret Fashion Show in New York on Nov. 10, 2010. (Mike Segar/Reuters)
Singer Katy Perry arrives for the 2010 Victoria’s Secret fashion show in New York on Nov. 10, 2010. (Mike Segar/Reuters)
Katy Perry performs a free concert at the at the Roseland Ballroom in New York City on Nov. 8, 2010, to help Microsoft and AT&T launch the new Windows Phone. (Timothy A. Clary/AFP/Getty Images)
Katy Perry performs a free concert at the at the Roseland Ballroom in New York City on Nov. 8, 2010, to help Microsoft and AT&T launch the new Windows Phone. (Timothy A. Clary/AFP/Getty Images)
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Katy Perry performs a free concert at the at the Roseland Ballroom in New York City on Nov. 8, 2010, to help Microsoft and AT&T launch the new Windows Phone. (Timothy A. Clary/AFP/Getty Images)
Katy Perry performs a free concert at the at the Roseland Ballroom in New York City on Nov. 8, 2010, to help Microsoft and AT&T launch the new Windows Phone. (Timothy A. Clary/AFP/Getty Images)
Katy Perry performs a free concert at the at the Roseland Ballroom in New York City on Nov. 8, 2010, to help Microsoft and AT&T launch the new Windows Phone. (Timothy A. Clary/AFP/Getty Images)
Katy Perry performs a free concert at the at the Roseland Ballroom in New York City on Nov. 8, 2010 to help Microsoft and AT&T launch the new Windows Phone. (Timothy A. Clary/AFP/Getty Images)
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Katy Perry performs a free concert at the at the Roseland Ballroom in New York City on Nov. 8, 2010, to help Microsoft and AT&T launch the new Windows Phone. (Timothy A. Clary/AFP/Getty Images)
In this Oct. 2, photo, Ukraine-born U.S. actress Milla Jovovich, left, gestures with U.S. singer Katy Perry during the German TV show “Bet It?” in Munich, southern Germany. (Joerg Koch/AP)
Actress Milla Jovovich, left, and singer Katy Perry joke during the German game show “Wetten Dass” (“Bet it...?”) in Munich, Germany, on Oct. 2, 2010. (Michaela Rehle/Reuters)
In this Oct. 2, 2010, photo, actress Milla Jovovich, center, is framed by Arien Robben, left, a soccer player for Bayern Munich, and U.S. singer Katy Perry during the TV show “Bet It?” in Munich, Germany. (Joerg Koch/AP)
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Singer Katy Perry arrives in a Dirnl, a traditional Bavarian dress, during the German game show “Wetten Dass” (Bet it...?) in Munich on Oct. 2, 2010. Wetten Dass is one of the most popular Saturday night programs in Germany and Austria. (Michaela Rehle/Reuters)
Singer Katy Perry performs on the TV show ‘Bet It’ in Munich on Oct. 2, 2010. (Joerg Koch/AP)
Singer Katy Perry wears a Bavarian hat as she chats with Thomas Gottshcalk during the German TV Show ‘Bet It’ in Munich. (Joerg Koch/AP)
Singer Katy Perry drinks Oktoberfest beer with German comedian Michael Mittermeier during the German game show “Wetten Dass” (“Bet it...?”) in Munich on Oct. 2, 2010. (Michaela Rehle/Reuters)
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Singer Katy Perry reacts during the German game show “Wetten Dass” (“Bet it...?”) in Munich on Oct. 2, 2010. (Michaela Rehle/Reuters)
Singer Katy Perry performs on the TV show “Bet It” in Munich on Oct. 2, 2010. (Joerg Koch/AP)
In this Oct. 2, 2010, photo, Katy Perry performs in Munich. (Joerg Koch/AP)
Singer Katy Perry stands between girls in Bavarian dresses during the German game show “Wetten Dass” (“Bet it...?”) in Munich on Oct. 2, 2010. (Michaela Rehle/Reuters)
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Singer Katy Perry stands between Bavarian dressed girls during the German game show “Wetten Dass” (“Bet it...?”) in Munich on Oct. 2, 2010. (Michaela Rehle/Reuters)
Katy Perry performs during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
TV host Thomas Gottschalk and Katy Perry attend the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry performs during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
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Katy Perry performs during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry performs during the 190th “Wetten, dass ...?” show at Olympiahalle on October 2, 2010 in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry performs during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry performs during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
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TV host Thomas Gottschalk and Katy Perry attend the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry reacts during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry reacts during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry reacts during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
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Katy Perry reacts during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Katy Perry reacts during the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
Comedian Michael Mittermeier and Katy Perry attend the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
TV host Thomas Gottschalk and Katy Perry attend the 190th “Wetten, dass ...?” show at Olympiahalle on Oct. 2, 2010, in Munich, Germany. (Johannes Simon/Getty Images)
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Singer Katy Perry performs at Z100 Jingle Ball 2008 at Madison Square Garden on Dec. 12, 2008, in New York. (Evan Agostini/AP)
Singer Katy Perry arrives at the MTV Video Music Awards on Sept. 13, 2009, in New York. (Peter Kramer/AP)
Singer Katy Perry performs at the MTV Video Music Awards Japan 2009 at Saitama Super Arena in Saitama, north of Tokyo, on May 30, 2009. (Itsuo Inouye/AP)
Katy Perry performs at the 102.7 KIIS-FM’s Jingle Ball 08 on Dec. 6, 2008, in Anaheim, Calif. (Shea Walsh/AP)
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U.S. singer Katy Perry arrives for the presentation of British fashion designer Vivienne Westwood’s Spring-Summer 2009 ready-to-wear collection on Sept. 29, 2008, in Paris. (Thibault Camus/AP)
Singer Katy Perry makes an appearance on MTV’s “Total Request Live” on June 9, 2008, in New York. (Evan Agostini/AP)
Pop star Katy Perry wears a yellow Vintage Jet Rag onesie with a red vintage belt and turquoise shoes by Nicholas Kirkwood at Bar Chloe in Santa Monica, Calif. (Bob Chamberlin/Los Angeles Times)
