britney0326112.jpgRoderick Trestrail

The legendary Ms. Britney Spears took the stage in Sin City last night - the first time since her Circus tour in 2009!

Spears was a "special guest" at Rain Nightclub at the Palms Casino & Resort on Friday evening in Las Vegas...

During the pop princess' 45-minute set, our girl Brit performed "Hold It Against Me," "Big Fat Bass" and "Till The World Ends" (all off her upcoming album Femme Fatale) to a crowd of about 1,500 people.

The performance was also filmed for an MTV special to be aired next week when the album is officially released.

And who kept the crowd occupied during the costume/stage changes? The Palms' resident DJ Pauly D of Jersey Shore!

To find out what small talk Spears made with the audience, jump below the cut...