They have clothing-optional body-painting parties.
Celebrity parties are not your average soirees. Take Ke$ha's house parties that are all the way out in Tennessee, for example. She throws "clothing-optional" shindigs, during which guests are invited to throw body paint on one another. "We just body-paint each other and run around," she tells Glamour. "I have a giant bed. I'm very much in touch with that side of myself. ... It's not a weird sex orgy thing. You can wear a bathing suit!" Good to know. (OK!)