This is a beautiful photo, but I'm sure you knew that. It is very catching with the vivid colors. Often when you try to make the colors this vivid, you end up with some issues with the color boundaries, but this photo is beautifully edited.
I really like the warm feel of the photo, and the lighting is very well executed. The back lighting profile is a lovely affect, though there is maybe a touch more blown out areas than I would like, especially at the forehead. The depth of field is very nice. The background is nicely blurred while the subject is beautifully in focus.
My main criticism is with the positioning of the model in the frame. If you are familiar with some of the basic rules/recommendations of photography, one that I think could have made a positive impact on this composition is filling the frame. My recommendation would be to reposition, rather than cropping, so that the model is in the left third and the top of her head is nearer the top of the frame. The subject of the photo is the model, and she only occupies about 20% of the frame. I think that minor adjustment would make a big impact on this photo.
WOW, so so pretty. And I love the colours, it creates such a jolly mood. the red, green and yellow compliment each other so well--and I especially love how sharp the photo is. Wonderful how you put full focus on the subject model! she is so lovely haha