When we first heard there was a Hills breakup, we hoped it'd be between Heidi Montag and Spencer Pratt. Unfortunately those two stayed together. The ill-fated reality show couple was Jason Wahler and Katja Decker Sadowski. The former Hills bad boy decided that he and his ex were just a tad too immature to be tying the knot. Ya think? Even Lauren Conrad told him that on the show! Jason said it was an amicable split and that he and Katja are "still good friends."