A shocking allegation has rocked Hollywood — Kevin Federline’s upcoming memoir “You Thought You Knew” accuses Britney Spears of disturbing late-night behavior with their sons. The bombshell knife claims allege that Britney’s children once woke up to find her standing silently in their doorway, holding a knife. Federline says he fears for the pop star’s well-being and warns her life is “racing toward something irreversible.”

Britney Spears gives lap dance on stage while performing on Leather and Lace at the Staples Centre as part of her Femme Fatale tour.