The Sun and US Weekly are both running the story of Brit's drunken, topless romp with a 21 year old college boy named Mike Encinias in a hotel pool.
She and her then-assistant, Shannon Funk, picked a handful of extras from her video shoot to party with, and things got wet and wild. Mike claims he would have spent the night but one of his buddies almost drowned in the pool and he had to leave.
One source said: "At one point Britney was simulating sex with him, putting on a really hot show."