Usually I don’t ask myself whether it is a sin to listen to some kind of song, but whether it is worth my time as a Christian. I ask two questions: Does it contribute to my personal holiness? Does it give greater glory to God?
If something, anything, in my life is not getting me to Heaven and it is not glorifying God by my involvement with it, it is useless to me and should be removed from my life. Sinful or not, that is not the question. Anything that fails to meet at least one of these two criteria has no place in my life and is wasting good time and energy that I could be expending in a worthwhile area.