Britney Heads To The Studio For Glee Rehearsals

Before checking out the competition at GaGa's Staples Center show, Britney Spears spent a day at the studio rehearsing for her upcoming appearance on Glee!

Britney wowed when she did two episodes of How I Met Your Mother back in 2008, so we can only imagine how fabulous she's going to be on a whole Britney-themed episode of Glee!

We can hardly wait!