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TV On The Radio

Singer Katy Perry performs onstage during the 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California.  (Photo by Kevin Winter/Getty Images)

Watch GRAMMY Artist Performances From Live On Letterman

Katy Perry, Adele, Coldplay, Wilco and other 2012 Grammy nominees perform Live on Letterman.

02/03/2012

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