'Glee' finale: Watch Mercedes & Brittany perform an original song
Glee wraps up its fifth season next Tuesday at 8 p.m. ET on Fox. In the episode, called “The Untitled Rachel Berry Project,” Mercedes (Amber Riley) begins a mall tour and gets a little backup-dancer help from her pal Brittany (Heather Morris). Watch the exclusive clip from the upcoming season finale as the two perform the original song “Shakin’ My Head” below!