Britney Spears has slammed Kevin Federline for making explosive new claims about the singer in his new memoir.

RadarOnline.com can reveal the pop superstar, 43, called out his "constant gaslighting" and claims his book, You Thought You Knew , is "full of white lies." Article continues below advertisement

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She said: "The constant gaslighting from ex-husband is extremely hurtful and exhausting."

"I have always pleaded and screamed to have a life with my boys," she added, referring to their sons: Sean Preston , 20, and Jayden James , 19.

The singer then laid into one of her brood, claiming she's barely seen him over the last five years.

"Sadly, they have always

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