THe official answer is that the International radio version is the album version and some US stations are getting the harder rock version. The official BJHQ answer is below:
hey Oompas! In a previous question, you answered something about a rock version and an album version. I'm still very confused about this, can ya help me out? Which version are we hearing on the radio? And is there a huge difference between them? Thanks for all you do.
asked by Sam on Thursday, August 8
Answer:
There is an album version of the song (that's what's on the radio overseas off the promotional cd that went to radio) and there's a rock mix of the song (slightly harder edged... that's going to certain radio stations stateside.)