the face looks very stylized to me. Aren't you going for realism? try finding reference from magazine etc. the first thing I noticed her pupil is too big.
I like the hair, its classic LOL keep up the good work.
In general the proportions of the facial features are wrong. The eyes should be smaller.. it looks like the pupil's are set way to deep in the iris.. which is making them appear to be offset from the center of the eye too far. There is also more of a ridge above the eye. The temples are convex instead of concave. Which on the left side of the head creates an abnormal buldge. The nose is not very realistic at all. It is too narrow. The ears are too small and too low. The nexk is too tapered and too narrow at the base of the skull. The motuh looks fine. I like the hair.. actually the hair kind of colvers up some of the problems but not all of them
also the neck looks odd, go look at your neck in the mirror, youll notice that it doesnt curve outword at all, it goes straight down until it his your trapazoids, (i think thats the name of the muscle, yes, no?) Also those lines that flow from the sides of the nose to the mouth are generally asociated with older age, and are not really apperent in younger people unless they are stressing the lines by forcing a big smile. Your character seems to be smiling, but not enough to cause the depth of those creases in my opinion. Mabye its just me.