Don't take me seriously (I got nothing on you), but I think that the the lihgter pruple highlights on the far sideof her face, under her lip, make the chin look too prominent, somewhat unnaturally. If it were darker purples I think that would help. I'd also expect her quarter-smile to make her crows feet (around her eyes) more prominent, like in the B.O.B.'s edit.
But really pretty, good work.