Whoa, that is some bigass poofy hair. Great lighting and your composition is nice, gives the feeling that she's poking around a corner. Her skin seems a bit unnatural though- a bit overly smooth.
One of my higher scored portraits. When I look at this the models face does appear doll-like. However the drama created by the hair and the side styled framing add interest for e. The clarity and lighting and contrast works nicely for me as well.