Believe it or not, I actually have a few comments on this one that I remember from when I first saw it.
The shirt she is wearing really morphs to her body, and that's cool, but the bulge under her breast on her right side looks a bit awkward. Although I assume its just her shirt pulling away from her body, it looks like her muscle and a bit strange. Also, the kinda blur/glow effect on the drawing really makes her look neat, almost mystical, but it makes the background look a bit out of place. The clouds and blocks look bland with the glow.
But that's me being a total prick as far as criticism. Take it with a grain of salt considering I love this piece.