Britney just moved into her new home, but she's getting ready to leave it behind for a few months when she leaves for her tour. A big part of the planning is making sure she's physically ready to do her thing on stage every night, and she just released photos of her rehearsals showing she's already in fantastic shape. Britney's abs are almost as famous as she is, and they're ready to hit the stage, 10 years after she landed on the scene with ". . . Baby One More Time."