Jessica Simpson did dye her hair brown a while back because John Mayer told her to do so. That’s what sources are telling US Magazine. John told Jessica that he wanted her to change because he didn’t want to be dating a “blonde bimbo”. Well, now that they have supposedly split, Jessica is back to her original blonde ‘do. BUT, Jessica had said at the Cannes Film Festival on May 18th that she was going back to her blonde locks because of her upcoming role in her new film, Major Movie Star.

“I think I do have a little bit more fun as a blonde,” she told Us. “People take me a little too seriously when I’m a brunette. They think I’m trying to be dark and mysterious, when really I’m not.”

Technorati Tags: Jessica Simpson, John Mayer, blonde, brunette, Major Movie Star, Cannes Film Festival