The whole work is absolutely riveting; it contains more than "surface", it reaches further than that. Great skin tones, perfect lighting (not overdone), and the flow of the hair is so natural. The shadows of her underarm are quite realistic (well done), and her whole persona is ethereal - the expression of the eyes help out. You've done well utilizing a true character; I mean, the little freckles on her body? Heh, cute. Oh, and the necklace is a very lovely touch.