Britney Spears took to the stage for the first time in three years last night in San Diego. The set was brief - fourteen minutes in total - but featured costume changes, Pussycat Dolls-style backup dancers and light and smoke effect. Spears didn't test out any of her new material on the crowd, and instead lip-synced along to Baby One More Time, Do Somethin', I'm a Slave 4 U, Breathe on Me and Toxic. The popstar has another performance scheduled for tonight at the House of Blues in Anaheim and tomorrow at the House of Blues on the Sunset Strip.