Holy GaGa! The Glee gang takes on hits like "Bad Romance" and "Poker Face," not to mention a whole slew of GaGa's signature outfits. Also, Lee & Crystal duke it out for the American Idol crown on Fox, while the coveted mirrorball trophy is finally handed to this season's Dancing with the Stars champ on ABC! See what else is new tonight:
American Idol on Fox
NCIS on CBS -- season finale!
The Biggest Loser on NBC -- season finale!
Glee on Fox
Dancing with the Stars on ABC -- season finale!
NCIS: Los Angeles on CBS -- season finale!
Parenthood -- season finale!
The Good Wife on CBS -- season finale!
Don't forget to check out the SideReel editorial team's individual columns and Twitter accounts over at our new Reel Critics page to see what we have to say about tonight's TV! What will you be watching?