i'm against the use of photoshop brushes such as the stars on the sides but your lines, colors and style are put together so flawlessly into an illustration that is truly visually engaging. Nice work, love.
I love the soft colors you used here. The whole piece has a very elegant look. The only think I could suggest to possibly strengthen the piece is to use something different around the border. The stars correspond well to the stars on her costume, but it doesn't look as meticulously thought out as the rest of the piece, and the star brush is slightly recognizable. A dreamy cloudy effect may be even more effective. (Only giving that kind of critique since advanced critique was requested, overall I really love it! )