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Katy Perry | GRAMMY.com
Rihanna + Katy Perry
Katy Perry: America's Biggest Export Goes Glam - Katy Perry in a hot pink sweater
Katy Perry performs on the 56th Annual GRAMMY Awards on Jan. 26 in Los Angeles
The Band Perry | GRAMMY.com
You're not really groovin' unless your hair is moving. The Band Perry's Kimberly Perry rocks envy-worthy hair during a performance on Nov. 20 in Berlin
Taylor Swift performs on the 56th Annual GRAMMY Awards on Jan. 26 in Los Angeles
They're just "Givin' 'Em What They Love." Prince and Janelle Monáe shake up the stage during a performance on Dec. 29 in Uncasville, Conn.
Watch the throne. Nine-time 56th GRAMMY Awards nominee Jay Z rules the stage during a performance on Dec. 9 in Los Angeles
Three's company. GRAMMY winners Sheryl Crow, Elton John and Lady Gaga schmooze at the Elton John AIDS Foundation's 22nd Academy Awards Viewing Party on March 2 in West Hollywood, Calif.