Can I give a few tips on "posing"? She looks like she'd love to pretend to be a model! You could pose her standing slightly sideways, instead of "straight on" as she is here. Maybe, body facing slightly left (or right), head facing forward. This would give it more of a professional portrait look. Also, her hands don't look very "natural." What do you tell a little girl dressed up like a princess to do with her hands? I don't know for sure! Hanging gently at her sides would work. If she was seated (body still slightly facing left or right), and you had something in front of her, you could have her "lean" (not really leaning, though) into one hand, with the other hand cupping the elbow.
She is a cutie, and looks like she'd be a very willing model for you! I'll bet she could "ham it up" and you could get some really fun portraits!
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