While Kevin Federline's weight gain seemed to happen just in time for the newest season of VH1's 'Celebrity Fit Club,' don't think he packed on the pounds purposely. Federline revealed to Access Hollywood that depression caused his overeating, and discussed his rocky relationship with ex-wife Britney Spears.

"Once you get depressed, you don't really feel like doing anything," Federline said. "You're kind of discouraged about yourself and then the weight gain too, or that makes me more depressed. I mean, it's a combination of all of those things."

Federline also admitted that his 2006 divorce from Spears was a contributing factor in his depression.