Back when she dated Jim Carrey he most likely forced her to make plastic, warped faces like he does during sex and in the ending result was this extreme sour face look.
If you look at her back in the film Empire Records she was hot! Then she hooked up with that plastic face freak and that's when her face started to go all sour and scrunchy! Damn you Jim Carrey! Damn you and the Elastic Man doll your mother fucked and bred with!!!