Even when the song comes out on itunes, people will still download it illegally so what’s your point?. You buy music because you know its a great way to support your idol’s career. It doesn’t matter if you listen and download it before its official release because you just couldn’t wait anymore. I don’t think its something that bothers him. Justin makes music for us, not for itunes. he’s not that kind of singer who only cares about the sales. Other than that, remember its not his song. Its a Far east movement song. Justin is just featured in it. If you really want to support justin you will buy the song on itunes even if you already downloaded it.