'Celebrity Fit Club''s Kevin Federline on Being Called K-Fat

Back when Kevin Federline was dating and then married to Britney Spears, he was known as K-Fed. More recently, he ballooned up to more than 240 pounds and was meanly re-nicknamed K-Fat. Now the former dancer talks to ET's Kevin Frazier about turning his life around with the help of VH1's "Celebrity Fit Club."

"I went through a lot of things and I definitely say that those things contributed to me gaining weight for sure," says Federline, referring to all the media scrutiny he underwent as a result of his much-publicized split from ex-wife Britney Spears.

Federline says that when he saw the much-published photo of himself on the golf course, at first he thought it had been altered.