6. Body
Use the same technique, copy the gradient fill for the body. Note you might to adjust the gradient of each shadow path to blend in with the overall illustration.

7. Hair
Pretty much the same, fill 1 path with the gradient, then use the
Eyedropper Tool to copy the fill.

8. Shirt
Same technique as the previous steps.
9. Skirt
Fill the skirt with a blue gradient, then use the
Eyedropper Tool to copy the fill for the shadow.

10. Hair details
Now you can add more details to the hair. Make shadow effect by adding Multiply paths. Add some highlights by using lighter gradient color. If you want, you can add more details to the clothes, lips, or add a cool tattoo on her body.

Final
After you get used to this tracing technique, you can basically trace anything!

More Samples
These are some of my samples that I traced from photo using the same technique.
