Katy Perry rocks a large pink hat at the 2012 MusiCares Person of the Year Tribute To Paul McCartney held at the Los Angeles Convention Center on February 10, 2012

 

LL Cool J plays host at the 54th Annual Grammy Awards held at Staples Center in Los Angeles on February 12, 2012

 

Bruce Springsteen gets worked up during his three-hour set at the Bonnaroo Music Festival in Tennessee on June 13, 2009

 

The Foo Fighters accept an award at The 54th Annual Grammy Awards at Staples Center in Los Angeles on February 12, 2012