Here’s a picture of the sketch I started off with.

 

Then I traced it in blue, taking liberties with curves and contours along the way. Those eyes are pretty creepy though.

 

Here’s the final tracing with slightly less creepy eyes.

 

Then I added stroke and fill colors. But the eyes are still bugging me and the skin color isn’t quite right so…

 

I adjusted the colors, made the little guy thinner and worked on the eyes and smile a bit.

 

A little bit of shading work and the addition of some music notes gives us our final product.