Katt Williams -- Sued Over Bizarre Concert Meltdown

Have you ever wanted to sue an artist over a bad concert? Well, the people who went to see Katt Williams perform in Oakland recently are doing just that ... TMZ has learned.

Williams and promoter Live Nation are on the receiving end of a class action lawsuit filed by Brian Herline on behalf of everyone who went to see the comedian "perform" on November 16.

According to the lawsuit -- filed on the day before Thanksgiving in Alameda County, CA -- Katt's show ended after just 10 minutes ... but not before he "confronted a heckler, took his clothes off, and attempted to fight at least three audience members."

The suit is seeking unspecified damages for "Katt Williams' non-performance."

Williams has been stringing together one bizarre appearance after another as of late and was actually arrested in Oakland just two days before the show in question.