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Trying to pick the best and worst performances on Glee hurts. It just does. Hundreds of songs have been given that special New Directions touch, and many — many — memorable numbers didn't make the cut. "Push It," "Proud Mary" and "Keep Holding On," we still salute you! "Single Ladies," we're sorry, but no one actually sang you.
Also, "Don't Stop Believin'" is obviously the clear winner in all-time best Glee performances, so we didn't include it in our list. (Hey, it bought us space for one more "best!") But enough lamenting: without further ado, the best and worst from Glee's first four seasons so far...