If I had a fifteen year old daughter.....(I could not go through that again) but if I did, then she would have had a decent enough musical education that she would not be impressed with any of the crappy stuff WE adults are discussing.
I know lots of fifteen year olds and MOST are NOT impressed with the current crap they hear on the radio. They tend to listen to older music or trawl through Itunes or Youtube till they find something they like.