Rachel sung her heart out. Brittany and Sam performed a romantic duet. And Kurt finally made it into NYADA. There were so many great performances during this week's Glee Season 4, Episode 9: "Swan Song" that we think it'd be pretty much impossible to pick a favorite. If you missed any of them, or if you just want to relive some of your favorites, then pull up a chair and take another look at each of the songs from this week's show.