Very nice idea. The only drawback was that the joining of the fabric with the woman in silhouette created a confusing line and image. It took awhile to make it out. Like the light in the background.
The color and contrast in this shot is excellent. My only suggestion would be to get more detail on the model. The scarf, hair, and arms all come together in the primary focus of the image and even though you know what it is, it is too distorted.
I think that this would have been stronger if you included a bit more of the model's torso. As it was it took me a moment to identify what this silhouette was. It would have also been less ambiguous if her arms were held somewhat more in front of her head. I like the non-intrusive background.