PARIS, LINDSAY & BRITNEY SCOOP!

A NIGHT THAT WILL LIVE IN GOSSIP INFAMY DEPT.: Here's down-and-dirty details no one's told you about the raunchy hijinks of Hollywood's new Trashy Trinity - PARIS HILTON, BRITNEY SPEARS and LINDSAY LOHAN - just moments before Paris flung that drink at Lindsay during a wild private party, raising a nasty bruise Li-Lo later showed off on Internet video!

Before the catfight exploded, the three skimpily-dressed sizzlers were merrily bumping and grinding around a stripper's pole. But fun ended abruptly when the feeling-no-pain trio started gossiping about guys - and Paris made the nasty crack that Lindsay takes her "sloppy seconds," lovers she's used and dumped.

Red-faced and furious, Lindsay screamed, "You f****** c***! You are a f******* b****!" That's when Paris, according to Lindsay and My Spywitness, added injury to insult - throwing the glass and striking Lindsay.

Grabbing her arm in pain, Lindsay started shrieking threats - but Britney stepped in, grabbed new BFF Paris and pulled her back, saying, "Let's go!" You know the rest of the story, folks - and, incredibly, Trashy Trinity's still a BFF team...so far!