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Lang Lang rehearses with Metallica for the 2014 Grammys

The worlds of metal and ivory-tinkling combine in an incredible pairing for this year's Grammy Awards - here are Lang Lang and Metallica in rehearsal for their performance.

1. Lang Lang and Metallica rehearse for the Grammy Awards

Lang Lang and Metallica singer James Hetfield show their horns ahead of Sunday night's performance.
2. Lang Lang and Metallica rehearse for the Grammy Awards

The whole band consult with the Chinese pianist.
3. Lang Lang and Metallica rehearse for the Grammy Awards

Guitarist Kirk Hammett is privy to what's known in the industry as the 'Classic Lang Lang' pose.
4. Lang Lang and Metallica rehearse for the Grammy Awards

James Hetfield bares his teeth in rehearsal.
5. Lang Lang and Metallica rehearse for the Grammy Awards

Bassist Rob Trujillo, Lang Lang, James Hetfield and a small psychedelic horse.
6. Lang Lang and Metallica rehearse for the Grammy Awards

Look at that left hand go!
7. Lang Lang and Metallica rehearse for the Grammy Awards

Chatting about the Grammy Awards performance in rehearsal.
8. Lang Lang and Metallica rehearse for the Grammy Awards

Bassist Rob Trujillo has a gift for Lang Lang, it would seem.
9. Lang Lang and Metallica rehearse for the Grammy Awards

Arm aloft, Lang Lang rehearses with Metallica.
10. Lang Lang and Metallica rehearse for the Grammy Awards

Lang Lang chats to Metallica drummer Lars Ulrich at a rehearsal.
11. Lang Lang and Metallica rehearse for the Grammy Awards

James Hetfield at the mic while the rest of the band (including Lang Lang) back him up.
12. Lang Lang and Metallica rehearse for the Grammy Awards

Looking over the sheet music for Sunday night's Grammy Awards show.
13. Lang Lang and Metallica rehearse for the Grammy Awards

Metallica's legendary duelling guitarists James Hetfield and Kirk Hammett, and Lang Lang.
14. Lang Lang and Metallica rehearse for the Grammy Awards

According to this brief setlist and handy lyric reminders for James Hetfield, they'll be performing Metallica's 'One'.
15. Lang Lang and Metallica rehearse for the Grammy Awards

The whole band consult with Lang Lang ahead of Sunday's Grammy Awards performance of Metallica's 'One'.