First of all, very good job! I had to really look hard to find something wrong with it.
The only thing I've noticed that you probably didnt consider well enough, is the light sources reflecting on the face/hair.
on the face its clearly coming from the left, on the body its from both sides.
On the hair (the part covering the face) is kind of all together which is kinda wrong if you were going for realistic lighting. The 3 left hair cluster reflect as if the light is from the right, and the other side is mirrored, that's kinda wrong I guess.. and theres a white underglow beneath one hair cluster which looks kinda weird..
Other than that, It's an amazing work! very good! keep it up!
I hope I did not offend you with this critique, I mean only to help you