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

Mariah Carey added her star power to the hotly anticipated return of MTV's of The Hills. Carey joined L.A. ladies Lauren Conrad, Audrina Patridge and Whitney Port for the season three premiere and after-party at Gotham Hall in New York City, where she performed her hits "Touch My Body" and "We Belong Together."
—With reporting by Bronwyn Barnes