Parties! The style, stars and scoop from Hollywood's hottest events

On Saturday, Mandy Moore tried her luck at a Texas Hold 'Em poker tournament thrown by tennis champ Andy Roddick. Moore joined Nicky Hilton and Venus and Serena Williams at the Seminole Hard Rock Hotel and Casino in Hollywood, Florida, to gamble and do some good. Proceeds from the evening went to the Andy Roddick Foundation, which supports charities that help abused and at-risk children.