Katy Perry: Bikini Beautiful at Raging Waters Waterpark

Katy Perry shows off her bikini bod as she has fun in the sun at Raging Waters Waterpark on Sunday (August 12) in San Dimas, Calif.

While she was there, the 27-year-old entertainer even attempted to boogie board!

PHOTOS: Check out the latest pics of Katy Perry

The day before, Katy tried to keep a low profile while she was out and about with John Mayer at a house party.

The pair was even spotted leaving the Chateau Marmont together earlier this month!

15+ pictures inside of Katy Perry at Raging Waters Waterpark…