My 1st attempt at drawing the image in Illustrator:
I was playing with gradients a little, but my lines are horrible. I am NOT proficient with the pen tool. Hopefully practice really does make perfect.
My 2nd attempt in Illustrator:
I learned a little bit about mesh gradients, which I incorporated into the shoes and hair. Also, some of the line work is a little better. Maybe in 6 months I'll take another stab at it to see how far I've come.
Edited to add: I didn't export very high quality images from Illustrator, so they are pixelated. The real images are much smoother. If I get around to it, I'll export them as PNG files and post again.