Brian Johnson from AC/DC got on stage with Billy Joel in New York this week to do AC/DC's You Shook Me All Night Long. I'm not saying it was as magical as Gianni Poggi & Adriana Guerrini's "Love Duet Act III" Tosca 1951, but it's close.
I'm sure you have wondered from time to time, much like myself, what is Perry Farrell up to when he's not touring with Jane's? On vacation perhaps, pumping money into some tropical third world country's economy? Kicking it with his pet chinchilla Ivan singing along to Porno for Pyros cassettes in the basement? Kegle exercises? Or maybe he's saving attractive aliens from an evil robot with the power of the key-tar. The answer is in this video.