IMPACT Artist: Kelly Clarkson New Album: Kelly Clarkson releases 'Piece By Piece' Tuesday, March 3rd Read More

GRAMMY Nominees 2012: Live On Letterman (page 7)

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Photo: Jeffrey R. Staab/CBS

Photo: Jeffrey R. Staab/CBS

Katy Perry: 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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