Britney Spears’ ex Kevin Federline makes bombshell claims about pop star in new memoir

Concerns about Britney Spears’ wellbeing have again been thrust into the spotlight following explosive new claims made by her ex-husband Kevin Federline.

Federline, also known as K-Fed, is a dancer and actor who was married to the pop icon for three years. In his forthcoming memoir, he warns that Spears appears to be “racing toward something irreversible,” hinting at a looming crisis.

“It becomes impossible to pretend everything’s OK. From where I sit, the clock is ticking, and we’re getting close to the 11th hour,” he reportedly wrote in You Thought You Knew, excerpts of which were shared by The New York Times.

“Something bad is going to happen if things don’t change, and my biggest fear is that our sons will be left holding the pieces.”

Spears and Federline were married from 2004 to 2007 and endured a highly publicised custody battle over their sons, Sean Preston, who is now 20, and Jayden James, who is now 19.

In one of the memoir’s most disturbing revelations, Federline claims their sons were deeply unsettled by Spears’ behaviour at home.

According to him, the boys would sometimes wake in the middle of the night to find their mother silently standing by the doorway, clutching a knife.

“They would awaken sometimes at night to find her standing silently in the doorway, watching them sleep — ‘Oh, you’re awake?’ — with a knife in her hand,” Federline reportedly wrote.

“Then she’d turn around and pad off without explanation.”

Despite the serious nature of his claims, Federline insists he has “never, ever, once, been against Britney” and has only ever tried to support their sons while maintaining a healthy co-parenting relationship.

“It’s hard because when I really reflect on everything that’s happened — my kids do not know the woman that I married. And I’ve spent two decades trying to bridge that gap,” he wrote.

He also takes aim at the “Free Britney” movement, which played a key role in ending the Toxic singer’s 13-year conservatorship, arguing that it may have done more harm than good.

“Now, more than ever, (our children) need your support. I’ve been their buffer for years, but now it’s bigger than me,” he admitted.

“It’s time to sound the alarm.”

While he stops short of detailing exactly what concerns him most, Spears’ recent social media activity, often featuring erratic videos of her dancing with minimal clothing, has already sparked alarm among fans.

Federline’s memoir is set for release on October 21.