I found your pic on the following site wall.alphacoders.com. Above is the direct link but it is also on the websites main page under "featured". Just thought you should know since someone appears to be taking credit for your work. Take care.
Amazing piece of art, almost flawless. But since you requested critique I will give you some. The sparks/fire/embers or whatever it is, should have reflected more off her skin; face, fingers etc. But again, amazing piece.