Lang Lang and Metallica rehearse for the Grammy Awards This image appears in the gallery:Lang Lang rehearses with Metallica for the 2014 Grammys 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. 15 images See the full gallery: Lang Lang rehearses with Metallica for the 2014 Grammys