Here's a switch -- instead of the media focusing on Jessica Simpson or Kelly Clarkson gaining five pounds, or Tori Spelling and Keira Knightley wasting away to nothing, the tables have been turned on, gasp!, a guy!

That's Kevin Federline in that photo above.

Yes, the same Kevin Federline who was once married to Britney Spears -- and it seem he's gained some weight.

When K-Fed arrived at the X-Games Celebrity Skins Classic last weekend, spectators couldn't believe this was the same dude who was once making sweet love to the Britster. But that's what happens sometimes when you're a parent. A chicken nugget here, an ice cream cone there....

But it seems as if Kevin is going to try to use his bigger frame to his advantage -- and get a weight-loss reality show out of it.

"He's not hurting for money," a friend of the rapper said, "but he'd like to make this work. He's not going to kill anything that might be coming together by talking about it in too much detail before he's really sure it's going to happen."

Which is probably why Kevin had no comment.

Would you watch Kevin in a Biggest Loser type of show?