IN THE latest battle between the wild girls of Hollywood, Britney Spears has reportedly threatened to leak footage of Paris Hilton in a lesbian romp.

The singer and her pals sent the heiress a letter warning her that they would leak the footage, which shows Hilton in a compromising position with one of Spears' friends, unless her attitude changed.

"The letter warns Paris that if she continues being rude to people, the footage will be leaked online," says an insider.

The former friends are said to have fallen out at Spears' birthday bash on the weekend after Hilton snubbed her.

But Hilton isn't taking the threat seriously.

"It's obvious Britney and her bratty pals are being silly. Paris laughed when she got the letter and said it was c--p," a source close to Hilton told the London Daily Mail.

Spears isn't the only person Hilton is at loggerheads with.

According to the New York Post, the House of Wax star is furious with starlet Lindsay Lohan, who is standing in the way of Hilton's plans to win back former lover Stavros Niarchos.

The Greek shipping heir ditched the socialite at a party on the weekend to hang out with Lohan.