As we mentioned earlier
, Britney Spears
threatened to cancel her much-anticipated Circus tour if her kids can't go on the road with her.
So BritBrit, Daddy Spears, and even Kevin Federline
have been working on an arrangement to have the kids with her while touring. They'd even pay the sperm donor an extra $4,000 a week while she's on tour and provide an apartment for him in three base camps that Spears will have around the