her skin poking through the cloth, just throwing it out there, though I don't really care because I know how difficult cloth simulation can be. 

I love the background. Very cool.

Her skin is very plastic looking due to the white highlights at the inside of the shoulder blades and near the base of the spine. If you're using P6 or higher, would definitely recommend SSS. Also the skin is very consistent. It almost looks procedural / not a texture.

Regarding the cloth texture (it is silk?) try "less broad" specular highlights, with almost no reflection.

Just noticed that the rim light appears on the right shoulder AND the left neck, which makes the key light appear less directional. In other words, the lights are too strong from too many directions.