03/06/2013 08:19 am ET

Jillian Michaels Tries To Help Ross Mathews Get Fit On 'Chelsea Lately,' But He's Not Having It (VIDEO)

Jillian Michaels stopped by for a visit with guest host Ross Mathews on "Chelsea Lately." Mathews has been filling for Chelsea Handler, though after Michaels' appearance he may have regretted agreeing to do it. Michaels was there to promote her new book, "Slim for Life: My Insider Secrets to Simple, Fast, and Lasting Weight Loss." The book features her tips for diet and exercise, so of course she had to share some of those with Mathews.

He wanted to have a body like Zac Efron, but there was one problem. He definitely didn't want to put the work in to get there, if his time with Michaels was any indication.

"Are you out of your mind? I’d rather be fat," he told her at one point, and this was just over drinking two shakes a week. She tried to push him to work out -- and even drink husks -- but Mathews had his own solution. "I’m wearing man spanx, thank you so much for being here, we’re out of time!" he joked.

Catch Jillian Michaels on "The Biggest Loser," Mondays at 8 p.m. EST on NBC. "Chelsea Lately" airs every weeknight at 11 p.m. EST on E!

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