Katy Perry smiles at the premiere of "The Smurfs" at the Ziegfeld Theater in New York.VIDEO: Smurfs hit NYC
REUTERS
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Screenwriter Max Landis and director John Landis attend the WIRED Cafe during day 2 at Comic-Con in San Diego.
WireImage
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Rihanna performs in a studded bikini outfit during her LOUD concert tour at Wells Fargo Center in Philadelphia.
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Olivia Palermo poses for photographers at the premiere of "The Smurfs" at the Ziegfeld Theater in New York.VIDEO: Smurfs hit NYC
REUTERS
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Michael Pena attends the WIRED Cafe at Comic-Con in San Diego.
WireImage
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Nicky Hilton goes for a stroll in Malibu.
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Roddy Piper makes his way to Comic Con in San Diego.
Zodiac / Splash News
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Michael Douglas and wife Catherine Zeta-Jones enjoy a night out with friends at 'Ristorante Puny' in Portofino on the Italian Riviera.
INFphoto.com
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A slimmed-down Jonah Hill leaves his hotel at Comic Con in San Diego.
Zodiac / Splash News
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Arnold Schwarzenegger, his son Patrick and his daughter Christina leave the Mattel Chlidren's Hospital at UCLA after visiting his son Christopher who is staying there recovering from a surfing accident in Los Angeles.