Hair-say: Did FedEx Force Britney Into Rehab?

During Britney Spears' recent wild weekend, Kevin Federline canceled plans to party in Las Vegas during the NBA All-Star weekend in order to stay in Los Angeles to be available for the couple's children.

Needless to say, we never imagined six months ago that we'd be writing such things about K-Fed. But that's the way the Hollywood Gossip world turns.

"Kevin is concerned for Britney and his children," says a friend of FedEx. "Of course he's concerned about her. He loves her. He's always loved her - even after she started divorce proceedings."

The couple has two sons together, Sean Preston, 17 months, and Jayden James, 5 months.

According to another source, the aspiring rapper and Nationwide pitchman had booked a room from February 14-19 at the Venetian Resort Hotel Casino, but canceled the reservation.

It's not clear if the K-Hole has been in direct contact with his sons or Spears, who voluntarily entered a rehabilitation facility on Tuesday. But it's looking like he played some role in getting the troubled, newly-bald Britney there.

The pop princess checked into Promises in Malibu yesterday, but the nervous breakdown that landed her there, TMZ reports, started with a furious phone fight with Kevin Federline.

The alleged topic of said conversation may surprise you.

"Kevin threatened Britney that he was going to have people test her hair to find out exactly what she's been up to," says an OK! Magazine source, which then led to Britney's well-documented shaved head.

For now, that's just hair-say. But one thing's for sure - Kevin isn't the only one who wanted her in rehab. Family members made desperate pleas for Britney to get help, and convinced her to go to Promises.

Let's hope she stays there.