I'll comment on the comments.
Heavy handed use of the blur tool -- I agree, it's overdone. Some people are into that "plastic doll skin" look (I'm not one of them), but if you're going for that look blurring is not the best way to go because as this image shows you lose not just the texture you're trying to lose but also edge detail. Also to my eye it appears the effect is absent or far less pronounced (for the better!!) on her lower half, which is a little incongruous. I'd tone the blurring on her face and arm down to match the rest of her. Leave the blur effect on her hair though, I like how that looks.
Head alignment seems strange / lazy eye -- I don't see this at all?
too much bird's eye view -- I disagree. You're not all that high and a lower view would have been less flattering to her figure. Also, you'd lose the top of the guitar and it'd look like she was leaning on a strange black box with white trim. I think you picked your angle well
background separation would have been nice -- Yeah, some rim light or even just a bit of hair light would have been nice, but it's not a deal-breaker for me.
photoshop is horrid, she doesn't look human -- If it wasn't clear from what I said already, I think this is a major exaggeration.
One thing I will add about the photoshop though : it seems to me you overdid the healing brush / clone stamp removal of the circles under her eyes. You want to tone those way down but not 100% remove them, it looks a bit unnatural. Or, what do I know : it could be make-up, could be an artifact of the over-blurring, or could be she's a few years too young to be posing without her pants on
So I've gone on for a while but that's just what I do (!), my nitpicks are really pretty minor. Nice job.