To be human is to follow the herd.

"It’s the same for books and popular music: the more copies a thriller or a pop song sells, the more likely you are to pick it up to see what all the fuss is about. Even in the online era, to be human is to follow the herd. Far from undermining this “network effect,” the Internet strengthens it by providing instant communication and feedback. In a recent online study conducted by researchers at Columbia, participants were allowed to download free songs from a list of unsigned bands. When they were informed about the preferences of their peers, the popular songs got more popular—and the unpopular songs got more unpopular."

From a very interesting article on the future of the music business in The New Yorker.