ToplineSinger Britney Spears slammed her ex-husband, Kevin Federline, in a rare personal message shared to her social media accounts, accusing him of writing “white lies” in his new book that accuses Spears of infidelity, abusing drugs and alcohol and questions whether the end of her conservatorship in 2021 was the right decision.Britney Spears and Kevin Federline divorced in 2007. (Photo by Michael Caulfield/WireImage for Sony BMG Music Entertainment)gettyKey FactsSpears, who has largely strayed from the l ...