Lindsay Lohan has accused ex-girlfriend Samantha Ronson's friends of conspiring to end the couple's relationship.
The pair split last week amid allegations that the DJ cheated on Lohan.
They then clashed at a party in Ronson's music producer brother Mark's suite at the Chateau Marmont hotel in Los Angeles on Friday night.
Samantha's friends have accused Lohan of trying to crash the party -- but she insists she was invited, and then ambushed by Ronson's brother and her celebrity pals, including Nicole Richie and Sopranos star Drea de Matteo.
Lohan, who was staying at the hotel after moving out of the home she shared with Ronson, tells Us Weekly magazine, "I only walked in there because this guy who I thought was my friend said Samantha wanted to speak to me. I walk in, and she's in the bathroom crying and someone's standing in front of the door.
"They asked me to leave.... When I was leaving, (Samantha's) friend starts screaming, 'Get the f**k out of here.' And then Nicole Richie walks past and goes, 'Uck,' and I don't know what I've ever done to her. Drea de Matteo walked out of the room and said, 'Come at me, b**ch.'
"Mark, who I had just spoken to a half hour ago and he was completely nice, is now saying, like, he's going to call the cops on me. They had to embarrass me. It's not fair: I'm a 22-year-old who's in love."
After she returned to her room, Lohan's Twitter page was updated with posts accusing Ronson of cheating, and attacking her designer sister Charlotte.
But the actress insists, "None of this garbage is true. Someone hacked into my Twitter page and had fake conversations. Someone obviously doesn't want us together."
And she denies claims that she returned to the party at 6 a.m. and tried to kick the door down: "Oh, please. They're making me sound like I'm crazy, like I beat her. It was scary for me. I was so alone. Everyone's turned on me. Samantha told me she would never break my heart or do anything to hurt me."
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