Beautiful model and great pose. Her make up and the hair arrangement are unique. The real downside here is the background - it is quite distracting, not being all out-of-focus, bright and dark - and totally steals from an otherwise exquisite portrait.
I'm guessing maybe you are going for the style of Librodo instead of a single ribbon winner (since I didn't see any of his that matched up well to this). Interesting angle on the challenge.