Remember that time when Ashlee Simpson made a huge drunken spectacle of herself and tried to pick a fight with Michelle Trachtenberg in public? Well, she's pulling that shit again. At the first anniversary party for Pete Wentz's Chicago bar, Angels & Demons on Saturday, she picked a fight with him and told him to leave in front of everyone. At his own bar.

A source tells celebrity blogger Perez Hilton that Ashlee "came up completely wasted and yells at him to leave. They fought, she told him he was horrible in front of a whole group of people and made him leave his own party early. So they make a scene and leave the bar."

The report also alleges the star became irate when someone took a photo of her leaving the club and she demanded they delete the images. The stars security team then reportedly ushered them to a corner and got their driver to pick them up and leave. (Source)

You'd think this would all be very emasculating for Pete Wentz -- until you realize this is the same guy who parades around in girl jeans, eyeliner, and hoodies three sizes too small. The only way you could possibly emasculate a guy like that is to literally pull down his pants and show everybody his vagina.

Ashlee with Pete looking drunkedy drunk in NYC in June: