What a cutie! Great job in general, especially that shadow on the left cheek. Also, the nose. I have found recently (shoulda found this out a long time ago) that sometimes over rendering the nose (or somewhat over doing the value changes there) seems to make it all look more real.
Hm I really like your brush strokes. Do you just use hard edge round brush with opacity pressure and no pressure width? I wonder what opacity, and if just meticulous brush blending or if you have a special blending method.