A heavily-overweight Kevin Federline is going back to doing what he does best in hopes of shedding the fat. The former backup dancer — who is rumored to be in discussions for an endorsement deal with weight loss supplement NutriSystem — has been dancing every day for three hours in a desperate bid to rid himself of the flab he’s gained since splitting from Britney.

“He’s tried all sorts of diets, but nothing’s worked so far….Kevin never was a gym bunny, he stayed in shape by dancing,” says a friend. “He’s desperate to slim down now.”