Tim Gunn"We're not dressing Snooki, we're not doing any of that stuff," Tim Gunn told StyleList about the upcoming season of 'Project Runway' in the American Express Skybox at Mercedes-Benz Fashion Week on Monday.

Despite his show's regular use of guest celebrities, Gunn also said he would refuse to make it work with another MTV reality show star, Amber Portwood of 'Teen Mom.'

"I will throw down the gauntlet," the 57-year-old said defiantly.

Filming of the ninth season hasn't started yet, but the show's mentor has a firm policy about not collaborating with naughty celebrities. "I do nothing that mitigates bad behavior, I want an end to it," he said.