The new single version was recorded on January 23rd at EastWest Studios in Los Angeles, CA during Metallica and Lang Lang's rehearsals for their performance at the Grammys. They will be donating part of the proceeds from the single to Music Cares.

The band had this to say about the release, "We had such an amazing time performing "One" with world-renowned concert pianist Lang Lang at a recent awards show that we want to share it with those of you who couldn't watch or just want to re-live it sonically.

"Our rehearsal at East West Studios is now available to download on iTunes in North America with the rest of the world coming very soon. It will be available on additional digital retailers shortly in China."