well, since they release most of ayus things on itunes, i dont think we can say this is just to "promote" her internationally...but it does give people who are planning on seeing the movie or who have liked the trailers a chance to buy her song. but i dont expect to see this on the top 10 downloaded songs on itunes
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"Remember, don't let others dictate your music taste. If you like whatever you're listening to, keep listening to it."