The edges of whatever she is sitting on look odd. I suppose that you tried to make this look like a studio shot, or shot it in a studio but had to clean stuff away? As you most certainly know, in studio shots things usually have sharp edges, but the blurryness of the edges in this shot isn't at all good. It's not smooth at all, which makes it look really unprofessional.
I like her energy lots, though, it really makes that picture.
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