Kevin Federline is being toted as the driving force that sent a bald Britney Spears running to rehab.

Britney Spears checked into rehab late Tuesday morning at the urging of her concerned family and friends.

Britney is seeking help at Malibu’s exclusive treatment facility, Promises, where she is pictured at above.

At Promises, patients share a room during their average 45-day stay.

Promises founder Richard Rogg told us that patients are at a very low point when they seek help.

“You have to hit a mental, spiritual, emotional kind of bottom,” Rogg said. “It’s that place where you are too afraid to go on living and too afraid to die.”

This breaking news comes just days after Britney shaved her head, and on Monday, “Extra” discovered new clues that may explain why Brit gave herself a buzz cut.

According to a stunning new report in OK magazine, Kevin Federline was at the pop star’s Malibu mansion on Friday when she arrived home from rehab, and a blowout between the exes broke out.

“They had a huge argument,” revealed OK’s Rob Shuter. “Kevin threatened Britney that he was going to have people test her hair to find out exactly what she’s been up to. She was so scared. That was what made her have her head shaved.”