Kevin Federline is naming names. In his new memoir, You Thought You Knew, the former backup dancer calls out Rosie O'Donnell, Jimmy Kimmel and other celebrities who publicly mocked him during his divorce from Britney Spears. "The gossip, the rumors and the public ridicule, it's all like a high school drama on a massive scale. And while I was lucky to have a strong sense of self by the time fame hit, there were still moments that got to me," he writes in the book, which was released on Tuesday, October 21.