Really great shot. Agree with most other comments and I'd just add the background really helps. As for the cigarette my only thought is that it's barely noticeable and I'm not sure it quite suits this particular model who looks a bit too clean or neat or something. Just my opinion though.
I think the close-cropping at the top tends to restrict this a bit, like she's "in a box". Perhaps that is the look you were going for, but I would like to see more un-restraint for her in that direction.
She has amazing hair and a beautiful body, but the face just ruins it for me, either ther lighiting was not thought out very well or it has been badly photoshopped around the neck region, it almost looks like all the natural shadows were shopped out of the neck, makes her look very unnatural. Although I really love the blue shirt in contrast with the orange hair, it creates a nice effect