First when I saw the photo, I thought; "Is that photo taken in some woods or something!?" due to the curly background the hair produces, in the right side. Then I saw the square to the top right, and realised that it wasn't the case. But im kinda confused, to be honest :p
IMO there are things in the photo which doesn't go hand in hand; the straight lines her cheek makes and the square, I talked about before, contra the curly hair to the right. It looks a bit confusing, I think.
So all in all, I dont know what to think about the background. But I guess it was all on purpose? - So please tells us a bit about what thoughts you did before the shot.
Speaking of the hair, I think its a shame too that it appears on her skin (on the shoulder). I would recommend keeping it away of the skin. And why are her bangs that straight when the hair is a mess next to her shoulder?
Her lipstick however, is pure awesomeness!
I really like the glossy reflexions from the lights to the right. Superb achieved.
The skinstones are cool aswell, and im nearly 100% sure that you retouched her as hell on the skin (or some makeup artist did the job for you :p), but I think the result are great.
Personally I don't like when people are over photoshopping the skin and makes it look 'porno'!
Let us see some more!
Your really good a this. Keep it up, sianerobertson.