Britney Spears will be opening the 25th annual edition of the MTV Video Music Awards on Sunday in Hollywood.Spears has garnered three nominations for the clip to her single "Piece of Me" -- Best Female Video, Best Pop Video and Video of the Year. Spears has yet to win an MTV VMA, and her nominations this year are particularly tantalizing after her much-derided appearance in 2007, when she lip-synched her way through a dance number in an ill-fitting black bikini.