The main issue I have with this shot is the severe craning of her neck to face the camera. She is totally sideways to the camera. Try her at a 45% instead. Seems slightly overexposed as well. Fix those two things and you have a winner. :)
This is really lovely, I love the all-white; I'd have pushed the hair off of her face. I see what you've tried to do but this is a really nice portrait that should have all of her sweet wee face showing clearly. The focus is nigh on perfect.