INF Daily found a waifishly thin Ashlee Simpson heading to dad Joe’s Christmas party last night with Pete Wentz. It’s hard not to notice the particularly-sharp angles of her jawline. According to In Touch, Ashlee’s emaciated frame is worrying her friends and family. Their source claims she’s addicted to a fitness routine called Cardio Barre, which is a mix of ballet combined with weights. At first it started off harmlessly enough, with Simpson attending classes once a week. But now she’s up to every day.

Supposedly Ashlee’s also eating less than 800 calories daily.