Good job here. Really only thing i could critique are very small details like colors being off the lineart, and a few lines being bold and with a square-like end.
Other than that, the relaxed feeling that both the girl and the colors, soft and warm give to this image is really amazing.
Keep on with this work, really good.
Also sadly i was not able to recognize the song. And i would preffer not to cheat by googling it.