I just LOVE the hair. You used the perfect palette for that style. I would know. XD
The highlights on the shirt should work with the folds an not be put down the middle. There should be breaks in the highlights to show folds instead of so many just on the sides of the top.
The jeans shouldn't be drawn to the body, either. If they're supposed to be skinny jeans, then... uh... I never do skinny jeans.
Not bad though! When did you start dolling?