Aerosmith & Led Zeppelin together.

Led Zeppelin & Aerosmith
http://www.youtube.com/watch?v=3zKxNWC-wJg

Guns N Roses AND Aerosmith LIVE!
http://www.youtube.com/watch?v=4Z6EWEtceZk

GUNS N ROSES & QUEEN sing We Will Rock You
http://www.youtube.com/watch?v=R_zlRQNeiXE
Queen and James Hetfield (Metallica) - Stone Cold Crazy
http://www.youtube.com/watch?v=7Qs2qu4a1f8