Is Kevin Federline still fat? Does he have a potbelly? Has he gained weight? Some estimate Kevin Federline’s weight gain to be around 20 pounds.

Maybe Keving should take a cue from his ex Britney Spears and start hitting the gym. The 30-year-old Fedrline appeared to be carrying a lot of weight when he recently partied in Miami. And he’s definitely not on a diet. “On June 27, he ate at Michy’s, a big place for foodies,” says an insider. “He had snapper, lamb shank and truffle mash.”

But mashed potatoes may not be the culprit. “Kevin likes to drink,” adds one of his pals, “especially beer. He doesn’t have a day job, so he has a lot of time on his hands and drinks one Heineken after another. Almost every night he has a couple of friends over, and they drink beer and watch TV. Add that to the fact that he’s been eating a lot of junk food and pizza lately and it’s clear what’s going on!” [source: Life & Style]