After a few blissful weeks of engagment announcements and baby rumors, the other shoe has finally dropped for Fall Out Boy, Pete Wentz.

TMZ is reporting the rocker is being sued by a man who claims he and his security team beat him within an inch of his life, during a Fall Out Boy show last year.

Andy Kallas says he was watching the band perform at Schuba’s Tavern in Chicago, when Wentz (who’s engaged to Ashlee Simpson and the father of her baby) and his posse began beating on him for several minutes. Kallas says the fight was completely unprovoked and came out of nowhere, however other sources say Kallas was being loud during the show, heckling the band, and shouting obnoxious things just prior to the fight.

A spokesperson for Pete tells OK!, "This case is meritless. We looked into it and the facts don’t support his claims.  We will vigorously defend this case in court."

Kallas is suing both Pete and the Chicago club for unspecified amounts in damages, claiming he suffered "serious injuries to his head, mouth and face."

Ouch!

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