Hi Emma, - youve done a good job with this. Shot settings are spot on, and its a very pleasant princess result.
Lots of good comments already above, and I will add my own as I go along.
Daves reference to white balance is right on, and its sooo easy to do the calibration with white paper or buy a gray card from a photo shop (CHEAP!), and shoot in RAW. The use the gray/white card to calibrate your white balance.
My main niggle is that since she is surrounded by pink, its hard to void a red/pink cast on her skin. Ive removed this in a mod and you can see it makes quite a difference. I would also reduce the saturation of the background so its more incidental, rather than playing a strong part in the shot. For me, Teddy stays, - hes just focused soft enough to play a peripheral role, and Princesses have Teddys!
Her face, especially around her eyes appears to have some shadows, or darker colourations that may be diminished by reflecting light into her face, (though it is a tad overexposed as it is}, but a better way I found though the mod was to apply a soft diffuse glow, - after all, - she is a Princess. This removes colourations around the eyes, and softens the image after all. And its easy to do with the Photoshop distort filter.
At ISO 400 there was a little noise I removed in Noise Ninja, - and Ive made the curtain on the left rather plain all the way by painting in the main curtain colour to removed reflections and bright spots.
As always, - I hope you find this constructive and helpful,