With a little more work, like some detail in her face and cleaning up the edges even more, this could be your best piece yet. It falls short of awesome! I use paths for my edges. Create a path around her body, inverse the selection and then you don't have to worry about smudging the background into the foreground. Also, take a brush and add details to the areas around her eyes and lips. Define her nostrils. THEN go make her pants a little more torn up. It might sound like a lot, but it will take this from "Really good" to "Out of this world"
All in all it is really good... I like!!