Kevin Federline is firing back at the backlash surrounding his memoir, 'You Thought You Knew.' In a new sit-down with Kevin Frazier in Maui, he pushes back on claims — including from Britney Spears — that he’s trying to profit off her. “I don’t care about that money,” he says. “I wrote the book because I wanted people to have a chance to get to know me. That way, whenever I came forward to ask for help, you would understand a little bit more about who this is that's asking for help." Britney has