she may just have hair that weighs less and/or a hair growth pattern that naturally goes away from the face. I have longish hair and I usually part it assymetrically like hers but to make sure it doesn't fall over one eye I pin it with criss-crossed bobby pins the same color as my hair in an inconspicuous way so that the pins are usually hidden in the hair. It's hard to explain, I just experimented with pinning until it looked right.