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

"What happens here stays here and a whole lot is staying here, boy!" said Drea de Matteo, who attended the Billboard Music Awards after-party with boyfriend Shooter Jennings. Pharrell Williams hosted the bash at Tao while Prince, Ludacris and will.i.am of the Black Eyed Peas danced until 5 A.M.