Bobby Brown: The Sig on the Pre-Nup Ain't Mine!

Somebody signed Bobby Brown's name on a prenuptial agreement with Whitney Houston -- but Bobby claims it wasn't him!

Just moments ago, Brown's lawyer, Stacy D. Phillips, told an Orange County Superior Court judge that she had an issue with the prenuptial agreement that Houston's legal team brought up earlier this week.

According to Brown's attorney, Bobby is prepared to take the stand and tell the judge that "It is not his signature" on the document.