Britney Spears has agreed to a massive $19 million divorce settlement with Kevin Federline, according to reports.

The pair who split four months ago have also reached an agreement over joint custody of their two sons, Sean Preston, 18 months, and Jayden James, 6 months.

Spears' was driven to finalize the divorce during her spell in rehab to treat substance abuse, according to Britain's The Sun. Could that be the secret behind K-Fed's sweet visits to "Promises" and all that romantic blurb about reuniting?

 

"Everything changed when Britney went into rehab. She and Kevin started talking again and he's been a tower of strength for her," a source told The Sun, "Her time in rehab has given Britney a lot of time to think, and has shown her Kevin loves his kids and is a good dad."

"A good dad" Federline will get a $2 million lump sum plus half of Spears' earnings during their marriage and half the proceeds from the sale of their Malibu, Calif., home. 

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