Britney Spears kicked off her two-year Las Vegas residency on Friday, Dec. 27 at Planet Hollywood Resort & Casino in front of a star-studded audience. Miley Cyrus, Katy Perry, Selena Gomez and Adam Lambert came out to watch the pop icon own the stage at the AXIS theater. The 32-year-old sported a number of costumes and wigs as she sang some of her best-selling hits over the span of her career, including tracks from her ...Baby One More Time album to her recent Britney Jean record. The Grammy winner was joined by a group of backup dancers during the 90-minute Piece of Me sho
