Lohan strikes a sexy pose on the set of a photo shoot in the Hollywood Hills. Plus: Kim Kardashian, John Mayer, Rihanna and more

GRACIOUS HOST

Newlywed Gisele Bündchen finds plenty to smile about at the Rainforest Alliance gala, which she hosted Wednesday at New York's Museum of Natural History. "I think I'm the happiest person," she told PEOPLE. "You know what the secret to being happy is? Being grateful. And I'm very grateful."



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