How Music Stars Spent Summer Vacation

Katy Perry hits the rodeo! Britney Spears goes for a ride with DJ Pauly D! See how the stars spent the hot summer months

DAVE GROHL & CEE-LO GREEN

"Hangout Music Festival. Gulf Shores, AL. Darling NIkki w/Cee Lo. A SUPER DUPER GROUP!" praised the official Foo Fighters Twitter feed after the band performed a cover of the risqué Prince song with Green.