Late last year, the ho train was formed.
And man, it was a hell of a run.
The tension between the commando queen and the sex tape star is reportedly so thick that they ditched the same fashion show in New York just to avoid each other.
Both pop princesses (pictured here last year with Brit's son Sean Preston) were slated to appear at the Heatherette show at Fashion Week, but both cancelled at the last minute, says the New York Daily News, because they didn't want to cross paths.
Spears, who just got dumped by new man Isaac Cohen, got almost as far as the parking lot before deciding she didn't want to risk seeing the hotel heiress, who reportedly branded Britney "an animal" to her friends.
Sure thing, Paris. After all, Britney's the one taking it from behind in multiple sex tapes and whose storage locker included pictures of Cisco Adler naked, right?
There might be another explanation for Hilton's absence, according to sources. Rumor has it she had a long night the night before and was still feeling the after effects, if you know what we mean.
Officially, Hilton's no-show was blamed on the ever-popular "stomach condition." Which we all know means about 10 shots of tequila and a liter of man soup in her system.