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

Mariah Carey arrived in true diva style for an autograph signing session at the Hard Rock Cafe in Universal City, California. Carey has plenty to celebrate—her new album, E=MC2 debuted at the top of the charts, and the songbird recently surpassed Elvis Presley to claim a record 18th Number One single after the first song off the album hit the airwaves.