Call me crazy... but I saw her lips and I immediately recognized Miley Cyrus, but then I looked at her gaze and I saw Jennifer Lawrence (even without reading the description) so you've got quite the interesting beautiful mix in your piece! The strokes and the contrasting hues give it a lot of life and create a sensual mood :3
Very dynamic and energetic. Love the improvised feel to the work mixed with the study of the model's face. An old art teacher of mine would have said "subjective use of colour" as a criticism, but, for me, that adds to the interest!
I love the way you handled her hair! ...But that being said, yeah, I didn't realize it was supposed to be Jennifer Lawrence until I read your comments, haha... But having read that, I definitely see the resemblance.