Kevin Federline Speaks Out on Britney Spears’ Alleged Drug Use and Erratic Behavior, Opposes End of Her Conservatorship: 7 Biggest Revelations From New Memoir

In his new memoir "You Thought You Knew," Kevin Federline provides his perspective on the aftermath of his marriage to Britney Spears. The book, set for an October 21 release, details how the Fresno-born dancer, now 47, was propelled into an intense media spotlight after meeting the pop icon at a Hollywood club in 2004. Federline, who had previously toured with acts like LFO and Pink, recounts joining Spears on her European tour only to be warned by her security team that he was boarding a "sinking ship." The narrative follows his journey from a private citizen to a central figure in acrimonious custody disputes, consistently underscoring his dedication as a father to his six children.

Federline identifies several key events that led to the marriage's dissolution. He describes discovering Spears kissing a female dancer in Amsterdam as an early turning point. A more severe incident allegedly occurred in 2006 at a Halloween party for his own album release, where he claims to have found Spears using cocaine while she was breastfeeding their infant son. Following a confrontation, Federline left to promote his music, and it was during an interview in Toronto that a producer informed him Spears had filed for divorce—news that he says blindsided him. In response to these claims, a representative for Britney Spears told Variety, "Once again he and others are profiting off her and sadly it comes after child support has ended with Kevin. All she cares about are her kids, Sean Preston and Jayden James and their well-being during this sensationalism. She detailed her journey in her memoir." This statement references Spears's own 2023 memoir, "The Woman in Me," which offered a starkly different account of their relationship and the conservatorship that governed her life for 13 years—a legal arrangement that gave her father control over her personal and financial affairs.

The memoir contains serious allegations regarding Spears's conduct with their sons, Sean Preston and Jayden James. Federline writes that the boys reported waking to find their mother standing in their doorway holding a knife on multiple occasions. Further claims from his children include that Spears punched Preston in the face, forcibly bleached their hair causing scalp burns, and knowingly gave shellfish to Jayden despite his severe allergy. In one particularly harrowing account, Federline recalls that after a confrontation, Spears told Preston she wished he, his brother, and Federline were dead. Some of these incidents were reportedly recorded by the boys on their phones, forming a crucial part of the evidence Federline used in his long-running custody battle to argue for the necessity of protecting them from their mother's influence.

Federline also weighs in on the broader public narrative, including Spears's infamous 2007 head-shaving incident and her subsequent 5150 psychiatric hold—an event he says he witnessed after she locked herself in a bathroom with Jayden. While he expresses feeling "sick over what she was going through," he states he supported the conservatorship, believing it was essential for her stability and the children's safety. This position directly contrasts with the Free Britney movement, which he characterizes as a "fandom's mob mentality." Dr. Alana Reed, a psychologist specializing in family dynamics in high-conflict separations, notes, "When one parent publicly disputes the other's parenting capacity, it can create lasting psychological effects on the children involved, who are often caught in a loyalty bind." Federline theorizes that the judge who terminated the legal arrangement in 2021 may have capitulated to public pressure, a decision he feels ignored professional medical advice. "The Free Britney movement got it wrong," Federline asserts. "All of those people who put so much effort into that should now put the same energy into the Save Britney movement. Because this is no longer about freedom. It’s about survival."

Now residing in Hawaii with his wife, Victoria Prince, Federline concludes with deep apprehension about his ex-wife's current condition. He describes an "increasing urgency" regarding her deteriorating situation, citing erratic behavior, social isolation, and a refusal to accept any form of help. He fears a tragic, irreversible outcome and worries most for their sons, who he says love their mother deeply but feel powerless to intervene. "From where I sit, the clock is ticking, and we’re getting close to the eleventh hour," he writes, presenting his disclosures not as an attack, but as a desperate plea from a co-parent who is gravely concerned for the future.