Ashlee Simpson is married to Pete Wentz and she's the mother of his child, but the no-talent hack is still insecure when it comes to his former flames.
Out-of-control Ash loudly trash-talked Gossip Girl star Michelle Trachtenberg Monday night at the "DJ Hero" party at LA's Wiltern Theatre, reports say.
The trouble started when Pete Wentz and Ashlee Simpson were seated near Trachtenberg, who dated Wentz before the Fall Out Boy bassist met Ash.
"The evening started off very civilly," reports the New York Post. "Pete and Ashlee had a pleasant conversation with Michelle and her boyfriend for close to 20 minutes, even showing [Trachtenberg] some baby pictures of [their baby] Bronx."
But then Ashlee Simpson started drinking and all hell broke loose.
Ashlee Simpson is apparently quite jealous of Michelle Trachtenberg's history with Pete Wentz, despite being married and having his kid. [Photos: Fame Pictures]
An increasingly loud Simpson began to give Wentz a lap dance while staring directly at Michelle and hurling insults at her: "She was grinding up on Pete like a stripper. It was actually pretty disgusting," a witness said.
Things reached a climax when Simpson, who just landed a role in the CW's remake of Melrose Place, screamed at a confused Michelle Trachtenberg, "I hope you know, the whole time you were dating Pete, I was [bleep]ing him!"
Jessica's younger sis had to be restrained at the event, where Jay-Z and Eminem performed. Ashlee Simpson was eventually dragged away by bystanders.
Who would you root for in a fight?