#2 High and Low Music as a part of the debate?

I know the debate about music and what makes music could be taken from a purely scientific view, but I think we've started to touch upon the fact that the human perspective, being vastly different from person to person, makes finding an answer to philosophical questions like 'what is music' incredibly difficult. For instance I think that Pretty Flowers by Steve Martin featuring Dolly Parton and Vince Gill is interesting especially since I have never been into bluegrass before, but yet I also find myself returning back to old standbys like Nsync because it reminds of my adolescence even though artistically most would say that the 'high' musical art in my choices would definitely favor Steve Martin compared to Nsync even though Nsync is by far more popular than Steve Martin in the 'mainstream' music world. I realize that there is already a division in what is considered to be sound art and what is considered to be music, but I can see the potential for there to be a division in what is considered to be true music and what is just rubbish. Maybe that's something to consider developing the idea of what is music and what is not.