Kevin Federline has claimed in his upcoming memoir that Britney Spears drank while pregnant and used cocaine while breastfeeding.

Britney Spears’ ex-husband Kevin Federline is publishing a new memoir titled You Thought You Knew next week. Yesterday, excerpts appeared in The New York Times which featured concerning allegations against the pop star.

Britney Spears’s rep says that her ex-husband Kevin Federline’s upcoming memoir is his way of ‘profiting off her’ after her child support payments ended. Spears also wrote on social media that the book is ‘gaslighting.’

Jamie Lynn Spears had some harsh criticisms about Britney Spears' parenting -- or lack thereof -- when it came to her two sons! That's what Kevin