According to reports, Paris Hilton and Britney Spears have been feuding. The warfare began when Hilton allegedly snubbed Spears during the latter’s birthday party. Now, rumor suggests Brit is actually threatening Paris.

Allegedly, Britney and a few friends wrote to Paris regarding a sex tape which is said to be in existence. According to one source, the letter says there is footage of Paris making out with one of Britney’s galpals. If Paris doesn’t act polite in public, Brit will make her pay – or so the letter supposedly says. One source claiming to be close to Paris says the heiress laughed away the threats, apparently unconcerned.