Britney Spears has returned - briefly - to the stage for the first time in three years. The rejuvenated singer performed a 14-minute set at San Diego's House of Blues. The surprise appearance was billed as M&M, and heavy security was present. Britney lip-synched her hits Baby One More Time and Toxic, and impressed with her newly-svelte body and raunchy dancing. The brief show featured several costume changes, dancers, special effects and smoke effects. Last week, Britn cancelled her appearances at the Forty Deuce club in Hollywood because she wasn't ready. The last time the 25-year-old performed on stage was in June 2004, when she injured her knee. She's set to play in Anaheim on Wednesday, Los Angeles on Thursday, and Las Vegas on Sunday. | 
