LAS VEGAS, NV - SEPTEMBER 21: Television personality Kathy Griffin (shoe detail) arrives at iHeartRadio Music Festival press room at MGM Grand Garden Arena on September 21, 2012 in Las Vegas, Nevada. (Photo by Chelsea Lauren/WireImage)
LAS VEGAS, NV - SEPTEMBER 21: (L-R) Drummer Tre Cool, vocalist Billie Joe Armstrong and bassist Mike Dirnt of Green Day arrive at iHeartRadio Music Festival press room at MGM Grand Garden Arena on September 21, 2012 in Las Vegas, Nevada. (Photo by Chelsea Lauren/WireImage)
