Hmmm, tough one. Gotta agree with PAS44 on ELP Welcome back my friends. They played it after an intermission (remember those?) Not a pure pick though as this was back in my young, dumb, chemically altered days.
Peter Frampton in what was it?? '76? The whole concert was magical, in no small part due to the audience.
Nora Jones a couple of years ago. I have no idea how a woman that young has that mature a voice.
4th movement of Beethoven's 9th. St. Louis Philharmonic Orchestra with choir.