I am compiling a list of songs about live performances. So far, the list is short. I've got:
Woodstock: Joni Mitchell
Rock and Roll Song: Valdy
Garden Party: Rick Nelson
Piano Man: Billy Joel
Killing Me Softly: Roberta Flack
Super Trouper: Abba (thanks CG)
Don't Play That Song: Aretha Franklin (thanks KM)
By the Way: Red Hot Chili Peppers (thanks C-Dawg)
Who else can help? Anyone? Anyone? (By which I mean you, Bueller. Oh, and you too.)