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Tuesday, May 21, 2013 | 7:56 p.m.

LL and Swift Host Grammy Concert

Taylor Swift and LL Cool J host the Grammys' second biggest night. The duo announced nominations for the top awards during an hour-long televised concert held in Nashville, Tennessee. Performers included Maroon 5, fun., Ne-Yo and The Band Perry, who performed a tribute to Johnny Cash with his song "Jackson."