I'm really surprised by that list. Country music just seems to keep growing and growing as far as sales are concerned... I wouldn't be surprised if it overtakes all of them in the near future.

I find that really odd... I can't even think of the last time rock music had a huge hit. Or maybe I just don't pay much attention to them Also, really odd that pop music is at #5. Maybe it's just the fact that very few things are "pop" nowadays. Even artists like Britney or Justin Timberlake go into other genres.