Watch Live On Letterman Concert Performances From GRAMMY Winners Including Taylor Swift, Adele, Katy Perry, More! (page 3)

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

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

Katy Perry: Two Nominations: Record of the Year and Best Pop Performance (both for “Firework,” below).

For more videos of Katy Perry Live On Letterman, click here

http://youtu.be/jusEL6drchE

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