Eh...
This isn't bad, by any means, but I don't think it's terribly amazing.
It looks like you put almost no effort into her head, face, and hair. And, as rude as this is going to sound, it almost looks like you traced the body off a photo and then coloured it and added in your own head, it doesn't flow nicely, even the position of the neck seems off. I'm sorry if this sound really rude, but that is what it seems like to me.
Also . . . How is her tiny shirt staying on? there are no straps on the sides, so there is no way it would just fit and stay perfectly like that. Her top in and of itself is oddly shapoed and conforms perfectly to the shap of her breasts.
I think you should work a little more on making sure things flow nicel and work together., by the way, the background is very nice.