It appears Britney Spears' ex-husband is throwing shade at Kevin Federline! In case you missed it, the former professional dancer announced last week that he is releasing a tell-all memoir in October, nearly two years after the pop star released her own book, The Woman In Me. It's called You Thought You Knew. Based on the title alone, he clearly feels there is way more to the story than what we got from Brit! A press release stated that the book will cover "fame, fatherhood and the private cost of public life - from one of pop culture's most misunderstood figures.