Just because you say something doesn't make it true. And the link you offer doesn't back up your claim either - it simply tells us that the soundtrack is successful.
The question is why they movie is doing so well. Yes, the music is a part of that, but it's surely not the only reason, and you'd have to offer some real evidence to support the claim that it is. I know from people that I know who have gone to see the film numerous times that they're going for more than just the songs.
