Very clever use of the graffiti! Assuming it was already there, and if it wasn't already there, nice painting work! :-). Possibly I would like to see just a little less shadow in her eyes, but still a solid image..
I wish her face weren't so dark. Other than that this is neat for sure. Were you trying to go for the look that she had wings? That is what it looks like to me and I really like that :-)