Seriously? Why do you want a critic for such a good piece of art?
I mean, the colours are beautiful chosen and I like that little gimmick with the feathers. Also it´s very original because who had the idea of making realistic portraits of disneycharacters?
I really like it, also the colourtechnic. The colours are really smooth and she is very very beautiful. I like how you draw the fur of her dress and also the necklace with the luminous diamond is really cool and nice to see.
Go on like that and draw and color more beautiful pictures like that.