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Mumford and Sons, Grammys, Performance

Kevin Winter/Getty Images

We'll have to wait to see if Mumford & Sons takes home Album of the Year. But we do know one thing: Their 2013 Grammys performance rocked.

The band (Marcus Mumford, Ben Lovett, Winston Marshall and Ted Dwane) hit the stage to perform "I Will Wait" off their (what else) Grammy nominated album, Babel. Equipped with their trusty guitars and backed by some glaring bright lights, the band brought down the house.

Just ask one apparent fan: Taylor Swift ! The fellow performer was spotted jamming out in the audience while they played.