The color palette is very smooth and pretty. All of them have a good hamony, what is very important for the eye. And great job with the backround, because I dont see any mistakes with the perspective and it has many details, like the folds of the curtains, the light coming out of the windows and the chandelier.
What I have to say about the girl, is that the proportions are right, but there is a mistake about her face. Because she shifts her head a bit to the side, the shape of the eyes and mouth should change aswell. Here I have the link for some examples for you: fav.me/d5bjnd1 The left hand is bigger than the other one, but the right one has the correct size. To draw the hand in the correct size, they have to be as big as the half of the face. Anyway, good job with the hair, the shadings and her clothes.
I really like this ^_^ I love the background. I really like the colour scheme too, kind of has a golden look. Especially with the subtle glitter I like her hair too. Only her eyes seem to be a little off-centre. Well done overall