Sonisphere headliner Metallica  performed a very special version of "One' with classical Chinese pianist Lang Lang yesterday at the Grammy Awards Show. Prior to performing Lang Lang said:  "We've had two rehearsals, and already I think this is the coolest thing I've ever done."

Metallica are a nine-time Grammy winner and 18-time nominee and narrowly missed out on a 10th Grammy Award for Best Recording Package at the ceremony for soundtrack album Through The Never.

Metallica"s collaboration wasn't the only surprise at the awards.  Slipknot drummer Shawn Crahan upstaged the majority of attendees on the red carpet, walking down it in the clown costume he normally reserves for Slipknot live shows.