Hilary and Mariska's Joyful Night and More!

Hilary Swank and Mariska Hargitay
Photo: Mike Coppola/Getty

That's what friends are for! Hilary Swank, Bridget Moynahan and Hugh Jackman were among the stars who turned out to support Law & Order: SVU star Mariska Hargitay at the 2011 Joyful Heart Foundation gala in New York City. Further downtown, Mary-Kate and Ashley Olsen stopped at designer Diane von Furstenberg's studio for the annual CFDA members' meeting before heading over to the Tribeca Grand Hotel to join Rachel McAdams at the Cinema Society's screening of Midnight in Paris. And speaking of Paris (Hilton, that is) the original celebrity socialite hyped her upcoming reality show at the Hollywood Roosevelt Hotel in L.A. Click through the gallery to see these stars plus Kate Moss, Naomi Campbell and more celebrities inside last night's hottest parties!

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