Ballerina Portrait

Hi! So today I have for you something which I drew with the help of an awesome book my awesome friends gave to me for my birthday (thank you-it is really amazing!).
Using all kinds of techniques, Noaki Watanabe helps you work on your illustration methods and find your own style.
I drew this face with the help of her step-by-step guide for proportions and I think it turned pretty well.
Next time-I'll try giving the face a different expression...any ideas?
xoxo Alex