The 55th Annual GRAMMY Awards - Backstage And Audience

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Singers Katy Perry and John Mayer attend the 55th Annual GRAMMY... News Photo55th Grammy Awards,Arts Culture and Entertainment,Attending,Award,Bestof,California,Celebrities,City Of Los Angeles,Grammy Awards,John Mayer,Katy Perry,Music,Staples Center,Topics,Topix,USA,VerticalPhotographer Collection: Getty Images Entertainment 2013 Getty ImagesLOS ANGELES, CA - FEBRUARY 10: Singers Katy Perry (L) and John Mayer attend the 55th Annual GRAMMY Awards at STAPLES Center on February 10, 2013 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for NARAS)