Katy Perry Dishes on Her Vegas Wedding

In Katy Perry‘s new single, "Waking Up in Vegas," she sings about getting into trouble in Sin City – something she knows about from experience.

Three years ago, the pop star, 24, went to Las Vegas with a boyfriend and decided to get "fake married," she tells PopEater.com. "We took all the pictures with the minister, with the fake cake, in the fake chapel and got a fake marriage certificate. We went and bought a wedding dress and a suit at a thrift store, and scanned the pictures and the certificate to my family members, my manager at the time [and] totally freaked the s— out of them."