Katt Williams was ousted as the host of the 2008 BET Hip-Hop Awards, taped in Atlanta last weekend, after he got into a furious argument with one of the show’s producers.

“Katt has become difficult now that he’s a megastar,” one source told the New York Daily News Thursday.

“He was very demanding during rehearsals. He really berated one female member of the production company. He launched into a verbal assault on her in front of other people. I mean, he read her the riot act,” the spy adds.

“Then he left the set and said he wouldn’t return unless she apologized. She wouldn’t. BET and the production company backed her up. Katt wouldn’t come back. Nobody was willing to budge.”

“So the night before the show, they had no host….At 1 a.m., the night before the show, they called T-Pain. He agreed to do it…..”

Lil Wayne was named “Lyricist of the Year” at 2008 BET Hip-Hop Awards taped in Atlanta on Saturday. This year’s ceremony will air on October 23.