-about 2 hrs on the nose concept
-about 2 hrs on the eye concept
-about 30mins on the lip concept
-about 1 hr on the hair concept
And then the rest of the time refining /shading it and adding details. I used a magazine as reference (looked at the models in it to see how the contours on the face changes when you smile etc) other than that everything was freehand.
Most shapes are 1 or 2%
Outline view:

Final Result:

