This is a remarkable artwork where the talents of model and photographer merge to obtain a beautiful result. I like the concept of the portrait, quite stylish and tasteful. The reds on the costume are a good combination to the browns on the piano and the whites on the wig and gloves. The control of lights on the background helps too to increase the color combination and to keep the attention on the model. The pose of the model is elegant helping not only to show herself but also the beauty of the piano. My compliments and respect to the model of making this delightful dress that it's quite stylish. Also the work on make up is extraordinary. Indeed a lovely piece of art.
There are several different elements that go in to "what is a photo". I don't have the list on me, so I'll speak off the top of my head: COMPOSITION is really good. There are a lot of straight lines, and they all "come together". - In an artistic sense, not a literal one.
POSE is very good. She has a very flattering figure, and you captured it. Also her clothing shows class, as does the prop, and her pose shows that as well.
LIGHTING and Colors go well to show off the model.
[Oh, I now see I have a Minimum word count. I thought it was the typical maximum, so I already formed my critique with tha in mind. Maybe next time I'll be better.]