The Hannah Montana star kicks off the celebration early on the The Ellen DeGeneres Show. Plus: Beyoncé, Posh & Eva and more


Is he working off his meal? The day after a late-night dinner date with Jennifer Aniston, John Mayer gets ready to hit the road following a workout at his L.A.-area gym on Tuesday.

See more hot men in PEOPLE's "100 Sexy Men in 1 Minute" video!