Watch Live On Letterman Concert Performances From Foo Fighters, Coldplay, Wilco, Adele, And Other GRAMMY Nominees!

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


Vote for which of these performances would win a GRAMMY award for Best Live On Letterman Webcast!


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