One recently got married, the other engaged.
One used to have a problem with crystal meth and peeing on stage; the other still has a problem with keeping her mouth shut.
The parallels don't end there. They both wear hideous coats!
At left, Fergie heads out of her hotel in a Juicy Couture coat last spring, while Katherine Heigl goes shopping in L.A. in her windowpane jacket.
Money and fame apparently can't buy style.
Anyway, here they are. Which babe wears this look better, the Black Eyed Peas singer / solo artist or the Grey's Anatomy actress?