That's a really nicely done image, though I think you would have a hard time asserting a copyright on an image taken in a concert. I am not sure about the exact legalities here, but when you take a picture in a concert, while you might have copyright, you can't really sell the image because Gwen holds the rights to any work that is produced during her concert. Without the rights to sell the image, I am not sure what value a copyright gives you.
Good work though. I like the sense of action in the shots.