Celebrity style: Katy Perry

Katy Perry poses backstage after performing at the 2010 MTV Movie Awards in Los Angeles. (REUTERS)
Katy Perry performs during the Victoria's Secret Fashion Show at the Lexington Armory in New York. (REUTERS)
Favorite online sensation and favorite female artist awards winner Katy Perry speaks after being presented with the prizes at the 2011 People's Choice Awards in Los Angeles. (REUTERS)
Katy Perry arrives at the premiere of her husband Russell Brand's movie "The Tempest" at El Capitan theatre in Hollywood, California. (REUTERS)
Katy Perry performs during the Victoria's Secret Fashion Show at the Lexington Armory in New York. (REUTERS)
Katy Perry poses during the launch of her fragrance 'Purr' at Selfridges department store on Oxford Street in London. (REUTERS)
Katy Perry accepts the award for Best Video at the MTV Europe Music Awards 2010 in Madrid. (REUTERS)
Katy Perry dances with MTV icon "Moon Man" as she arrives at the 2010 MTV Video Music Awards in Los Angeles, California. (REUTERS)
Katy Perry poses at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of, "American Woman: Fashioning a National Identity". (REUTERS)
Katy Perry poses for photographers as she arrives for the Brit Awards at Earls Court in London. (REUTERS)
Katy Perry performs at the KIIS FM's Jingle Ball concert in Los Angeles. (REUTERS)
Katy Perry performs during the VH1 "Divas Salute The Troops" show at the Marine Corps Air Station Miramar in San Diego. (REUTERS)
Katy Perry arrives for the 2010 Victoria's Secret fashion show in New York. Perry was performing as part of the show. (REUTERS)
Katy Perry arrives in a Dirnl, a traditional Bavarian dress, during the German game show "Wetten Dass" (Bet it...?) in Munich. (REUTERS)
Katy Perry smiles during an interview for the television show 'etalk' in Toronto. (REUTERS)
Katy Perry performs "California Gurls" at the 2010 MTV Movie Awards in Los Angeles. (REUTERS)
Katy Perry blows a kiss as she arrives at the 2010 MTV Movie Awards in Los Angeles. (REUTERS)
Katy Perry poses backstage at the 51st annual Grammy Awards in Los Angeles. (REUTERS)
Katy Perry hosts the MTV Europe Music Awards ceremony in Liverpool, northern England. (REUTERS)