“It was upsetting. It’s [usually] easy for me to brush stuff off of my shoulder. [But] when I see a pictures [of me] like that, and people are calling me ‘K- Fat,’ I had to do something about it.”

Although he was once known for his marriage to Britney Spears, Kevin Federline started getting attention recently for another matter: his weight. The one-time dancer had ballooned to a whopping 232 pounds by the time he checked in - along with ex-girlfriend Shar Jackson - for VH1’s latest installment of Celebrity Fit Club.

So how did the former tank top lover let it get this far? “I fell into a bunch of whole baby having, and love…and love again. I know I went through a period of depression and probably about a year ago, I started coming out of that,” he explained to Dr. Ian Smith. “I picked up so many bad habits along the way that it was just a balloon effect.”

If you want to follow Kevin’s journey, you can watch the debut of Celebrity Fit Club: Boot Camp this Monday on VH1. Otherwise, you can fast forward to see Federline’s progress from an Entertainment Tonight interview below