Kristin & Brody: It's Over! Again!

Sources close to Kristin Cavallari and Brody Jenner tell us that they have called it quits.

This is not the first time that the pair have taken a breather.

They first took a hiatus from each other earlier this year, during which Kristin quite memorably hooked up with Nick Lachey.

This time, however, sources tell us that the split is for good.

Source: PerezHilton