It's hard to remember the days when Kevin Federline was one of Britney Spears buff backup dancers. Since their courtship, marriage, two children, and ultimate divorce and custody battle, we're most used to the slightly pudgier K-Fed.

All those years of being Mr. Spears - the not working and hanging out, smoking pot, and getting the munchies while Britney brought home the bacon - resulted Federline packing on a few extra pounds. But now he's ready to cash in by getting back in shape, and then sharing his fitness secrets with the world.

Fox News reported Kevin as saying "I plan to get back to looking ripped and sexy again - I know I have let it all go but watch me fly this year."

Federline, 30, is hoping to release the fitness DVD in January 2009.

K-Fed recently admitted that his weight has ballooned because of the "pressure of looking after my children." Kevin was awarded custody of the couple's two children, Jayden James and Sean Preston, earlier this week.