Proportions are of by a mile and it looks like she doesn't have a nose, though I am guessing this is because of the way you scanned the picture onto your pc. The clavicle bones are too far up, if you know what I mean.

I would probably have done the t-shirt different aswell (smaller opening around the throat) but meh, that's just "texture". Her breasts are a bit weird too.
The hair turned out nice though