Singer and pop sensation Katy Perry gave her fans a nice treat when she accidentally exposed her behind when she tried an exciting water slide.

Just when we thought that Katy Perry's bikini body leaves little to imagination, the singer proved that she has a smooth and white rear when she had a bikini malfunction yesterday after trying out the waterslide at the Raging Waters in San Dimas.

The singer is known for her love of amusement parks. The singer just laughed off what happened and went to try other rides in Californian waterpark and her fans cheered on.

Despite appearing before her fans without any make-up on, the "Wide Awake" singer looked stunning as ever. Moreover, she showed off her enviable body.

Rumored boyfriend John Mayer missed the event. The two seemed to be getting more and more serious with their relationship. The pair was spotted in several occasions and has become a hot item in the celebrity dating scene.

On Sunday morning, John Mayer was seen driving out of Katy Perry's garage after the two spent the night together during a house party in Los Feliz, at Perry's home the night before.

This is not the first time that Katy and John attended an event together. The two attended a Hollywood party thrown by big wig agent Michael Kives.

"Katy and John never left each other's side and were flirting and affectionate the entire time. Katy loved it!" an onlooker boldly said.

John Mayer is willing to let go of his womanizing ways and make changes since he met the singer. Several sources said that the two are now willing to settle for a serious relationship.

Before Mayer, Katy Perry was married to comedian Russell Brand, with the divorce finalizing on July 16. After the split was announced she began casually dating Florence The Machine's guitarist Patrick Matera.

John Mayer, on the other hand, had a bunch of women in his hands from Jennifer Love Hewitt, Jessica Simpson, Jennifer Aniston, and a rumored fling with much younger country star Taylor Swift.

See the slideshow for the photos of Katy Perry.