Kevin Federline -- My Kids Won't Perform With Britney, Unless ...

Kevin Federline says he doesn't want his kids on stage with Britney Spears in Las Vegas -- but we're thinking there's gotta be some way to work this out ... some financial way, perhaps?Come on ... that's a HUGE allowance K-Fed gets.

Source: http://www.tmz.com/2013/09/24/kevin-federline-britney-spears-las-vegas-tmz-tv/

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