Britney Spears Celebrated Her Las Vegas Opening Weekend!
Description:Britney Spears had one very busy and exciting weekend. The reigning pop princess debuted her Piece of Me concert residency at Planet Hollywood in Las Vegas on Friday evening to a crowd of famous faces, family, friends and tons of diehard fans. In fact, according to an insider, Brit Brit "just stayed at her hotel and had some quiet time with her family." "She is really happy," the source added.(0:36)