Katy Perry makes surprise appearance at UK screening

Slideshow posted in Photos | Thursday, June 07, 2012

3 of 4: Pop superstar Katy Perry makes a surprise appearance at a special sneak preview of her new 3D feature film 'Katy Perry: Part Of Me' at the Apollo West End on June 7, 2012 in London, England. ( Photo / J Hogan/Getty Images For Paramount Pictures International)

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