I saw this picture on the MLP Wiki and I impulsively vectored it.
Upon completing this, I'm reminded why I don't like to draw ponies with clothes or accessories. This was something akin to a layering and coloring nightmare.
Edit (3/4/12): Welp, I caught a coloring error in Fluttershy's back wing. It wasn't too noticeable, but it was significant. I just can't believe I didn't catch it until now.
I don't own My Little Pony.