Most of the songs on the official soundtrack are sung completely different than in the movie. Is there other versions of this soundtrack out there? Is there a website that I can search for import soundtracks?

Have you checked Amazon? That's where I found mine - still some good deals on it there.

That soundtrack has the various artists singing their songs. Its different in the movie for about half the songs. They used one singer to sound like Ellen Aim and she only sings 2 of the songs on the soundtrack listed on Amazon unfortunately.

Is there a 'region 2' soundtrack or something?