Really nice!
Overall well-done. I loved the colors of the head, especially the hair and eyes. The colors are rich, and really pop out!
However, the lower portion of the body was didn't seem to have the same pop as the upper half. the details and colors didn't quite "pop" to me as the head did. Maybe it's the colors, or maybe it's just me.
That said, it was nice. I thought it was a good artistic touch that you didn't draw out the whole background. The effect definately left more focus on the girl, which I thought was a nice touch.