I agree with you, awsome song and indeed a very nice subject for a piece of art.
I like the personal twist you gave to it, making it far more angel-like and giving it a sort of innocent halo. Personally, I am not completely sold by how polished this it, because it contrasts so much with the messy child dancing in the video. Imo, messiness, chaos and weirdness are the truly amazing features of the video of 'Chandelier'.
However, if your intention was to create something more in line with the classical aestethic, then good job!