Oh, God. I wish I could write all of them...let's see. The one I really want is: My Songs Know What Ты Did in The Dark (Light Em Up). Here Comes the Sun for a Beatles tribute. This Love, Breakaway, I Write Sins Not Tragedies, and One день Too Late, sung by Rachel about Finn
Just Give Me A Reason by Pink, When It Rains by Paramore, How To Save A Life for Finn, Clocks by Cold Play, Buy Me Любовь for the tribute -very unlikely to happen.