Well, we knew he would do something to lose the weight.

Kevin Federline has officially signed on to join the cast of VH1’s Celebrity Fit Club! Federline passed up a chance to be paid to lose weight in order to participate in the reality hit. The interesting part is that Federline’s ex, actress Shar Jackson, is also in talks to be on the show. Shar and Kevin were in a relationship until he started dating Britney Spears, and they have two children together.

Should be interesting……..