Watch Live On Letterman Concert Performances From GRAMMY Winners Including Taylor Swift, Adele, Katy Perry, More! (page 6)

Taylor Swift LIve on Letterman (CBS photo by John Paul Filo)

Taylor Swift LIve on Letterman (CBS photo by John Paul Filo)

Foster The People: Two Nominations, Best Pop Duo/Group Performance and Best Alternative Music Album. Performed on the broadcast.

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