Looks like having all that plastic isn't so fantastic after all for blow-up Barbie, Heidi Montag. Her troubles began when she revealed her 10 plastic surgery procedures to her mother and expressed difficulty eating and exercising - to which her mom snarkily offered to put a burger in the blender for her. Now it seems her surgery-related problems have grown worse. A source on the set of The Hills revealed to Us Weekly that the starlet picked up a nasty pill-popping habit post-surgery. "She's a shell of her former self," the insider said. Well, if that's true, it's not a great loss. But sources cite that the couple have seemed more erratic than usual lately. Spencer Pratt's tweets have gotten more confrontational, attacking Kim Kardashian, Lindsay Lohan and Samantha Ronson, seemingly for no reason. And the terrible twosome are shopping around their own reality show post-Hills -- as if everyone hasn't already had enough of them. The pull of fame is irresistible for them, according to "friends." A source says the two have "crossed over to this bizarre place. They are addicted to the fame," the source says. "As The Hills winds down and people start to care less, they are desperate to get back that high." Heidi's not the first Hills resident to face drug problems. Kristin Cavallari's cocaine use has been addressed on the show and in various media outlets. Sounds like the only reality show these people need to appear on next is Celebrity Rehab.