Oops, he did it again.

Kevin Federline insisted that he was “just trying to help” his ex-wife Britney Spears with his bombshell memoir, “You Thought You Knew.”

As the pop star, 43, reportedly “spirals” over the tell-all , Federline told Vanity Fair in an interview published Thursday that he didn’t publish the book to “hurt her” or “bring anybody down.”

The former backup dancer, whose memoir accused Spears of cheating on him , abusing their children and doing drugs while breastfeeding them, claimed he was “coming from a place of understanding.”

The 47-year-old said, “I want people to know that I played a part in all of this as well, right? I’m not pointing fingers here.”

While acknowledging that they both partied while raising sons Sean Preston, 20, and Jayden, 19, he alle

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