Troubled popstar Britney Spears is set to tell all about her ex-husband Kevin Federline in an autobiography, claiming the aspiring rapper allegedly drove her to suicide. The Toxic star, whose turbulent life has included a brief Las Vegas wedding, a bitter divorce and custody battle and a stint in rehab, will lift the lid on her high-profile public downfall, which saw her bizarrely shave off all her hair. Publishers are already fighting over the rights to the book, which is tipped to earn the singer $10 million (GBP5 million).