United Kingdom, Oct. 16 -- Britney Spears has hit out at her ex-husband Kevin Federline's "constant gaslighting".

The Oops!... I Did It Again singer's former spouse - the father of her children Sean Preston, 20, and Jayden James, 19 - has made a series of explosive allegations about the star in his memoir You Thought You Knew, including that she used to stand over the boys with a knife when they were sleeping, but she has hit back at his "white lies".

Britney wrote on social media site X: "The constant gaslighting from ex-husband is extremely hurtful and exhausting. I have always pleaded and screamed to have a life with my boys."

The 43-year-old singer continued: "Relationships with teenage boys is complex. I have felt demoralised by t...