Kevin Federline’s first "ex", Shar Jackson, is speaking out about her baby daddy’s ongoing custody battle with Britney Spears. Extra caught up with Jackson at this year’s Boom Boom Room event. When asked how Spears’ and Federline’s children are doing, Jackson responded, “I think they’re fine. I think they’re good. I think they’re in a good place. They’re happy campers.” Jackson and K-Fed have two children together, Kori, 5, and Caleb, 3.