WATCH: Metallica Performs with Pianist Lang Lang at the 2014 Grammys

Published:12:21 am EDT, January 27, 2014| Updated:12:21 am EDT, January 27, 2014|

Jared Leto took the stage to announce a seriously amazing performance ... Metallica, accompanied by classical pianist Lang Lang on stage at the 2014 Grammy Awards. The legendary band performed their old hit "One" and gave a phenomenal performance.

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