Well, we know he's got a thing for blondes!

Rumor has it Xtina is already rebounding from the downfall of her five-year marriage with none other than BFF Nicole Richie's brother-in-law, Benji Madden.

Benji, who previously dated Aussie pop-star Sophie Monk and former Richie BFF Paris Hilton, has been single (and sexy) for a while, but could he be looking to settle down? Or is this just a rebound fling?

Course, sources tell us that Christina's been playing for the other team since her breakup, with another Richie friend, Samantha Ronson, so we're not too sure about this one.

What do you think, would the Good Charlotte boy and Beautiful girl make a good couple?