New party-buddies Paris Hilton and Britney Spears might be more than just friends, according to a report in the News of the World.

A source claiming to have inside knowledge about the duo told the newspaper that when the two met for a night out in Las Vegas a fortnight ago: “they went into a toilet and came out 20 minutes later, clothes and hair all over the place.”

Then, after the much-photographed night of partying, they went back to Britney’s hotel suite: “They love to prance naked in front of each other and that night they really got to know each other.”

The source went on to say that it was Paris who ‘encouraged’ Britney to go knicker-less during their nights-out over the last week: “Paris loves the fact that Britney gets turned on by going commando.”

“She even demanded that Britney take her knickers off in front of her. Britney just obeyed.”

The source added that while Britney might seem to be enjoying herself and her new partying lifestyle, her mum Lynne is less than impressed: “She was relieved when her daughter dumped husband Kevin Federline.”

“But with Britney going for custody of her two young sons, Lynne fears her antics might influence the judge.”