This is exquisite work - it's a beautiful portrait, I think the angle and the black frame really gives this a "movie" feel to it. The line work is exquisite, every detail is well formed and well proportioned. I love the delicacy of the shading, and the texture of the hair, although for c.c I think maybe a little more shine on the wisps of hair going across her face would really strengthen the tones and look great. Perhaps the same for adding a little curved area of light on the pupils?
As it is now, it is an excellent piece. The expression, the precision, and the concept make it the best piece of work I've seen today