Celebrity gossip site TMZ has learned that attorney Gloria Allred is on her way to court regarding the Britney Spears / Kevin Federline custody fight.

Allred will reportedly inform the judge that she has a secret witness who wants to testify at the September 17 custody hearing.

Allred plans to tell the judge the witness is "intimidated" and concerned about revealing his/her identity (though reports say it's a he).

TMZ's prediction: Gloria is going to get her publicity seeking rear end unceremoniously booted out of the hearing. Tuesday, K-Fed's lawyer, Mark Vincent Kaplan, also told Judge Scott Gordon that he had a "secret" witness.

Judge Gordon said, unequivocally "We don't do secret witnesses." Do Gloria and MVK have the same "secret" witness? Signs point to yes.

Left: Britney Spears. Right: Gloria Allred. Hard to say who's hotter.

Meanwhile, Britney Spears' lawyer, celebrity divorce kingpin Laura Wasser, tells TMZ exclusively: "With all due respect to Ms. Allred, she's attempting to bring her own ring to what was already a three ring circus."

We just hope Brit shows up to court in no underwear.