Britney Spears's ex wants to lose weight

Former backing dancer Kevin Federline is to appear on Celebrity Fit Club.

Britney Spears‘s ex will take part in the seventh season of the VH1 show.

Kevin, 31, has been dubbed K-Fat on some internet blogs for his dramatic weight gain.

His ex-girlfriend Shar Jackson, the mother of his kids Kori, 7, and Kaleb, 5, is also tipped to star in the programme.

Kevin is also dad to Sean Preston, 3, and Jayden James, 2, with Britney.

Celebrity Fit Club premieres in the States on 14 February 2010.

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