Fame Pictures While you were sleeping, Brit was getting her groove on last night.
But not at some club. No, the pop tart dropped in on a Sunset Boulevard 24-Hour Fitness facility, over by the oh so trendy ArcLight Theater.
She arrived around 1:30 a.m. accompanied by her assistant Carla (not pictured) and Sam Lutfi (who actually looks like he could use a workout).
Then the gym's staff closed off a corner of the gym with a black tarp for the pop star to practice dance moves until around 4 a.m., says a witness.
Either this girl has superhuman energy levels or she's consuming some serious quantities of No-Doz. Either way, her schedule's frickin' exhausting.