Does it count as fan art when it’s your own book?

This is the sketch  I created to try and show my publishers how the girls in Girls on Tour all know each other …  Using the ‘seven squiggles and add hair’ ™ method I developed during boring Geography classes when I was fourteen.

I can’t believe they managed to turn it into this. Or that the brilliant Adrian Valencia managed to turn it into this … I may not be embarking on a career as a professional illustrator any time soon: