Credit: Joe Scarnici/WireImage.com

Air Date: 12/18

Lady Gaga is just one of a ton of big-name performers in this concert special (taped December 9 at NYC's Madison Square Garden). On the list: Kelly Clarkson, Demi Lovato, Pitbull and LMFAO. Khloe Kardashian is a host! (Fuse, 7 p.m.)