I have absolutely no idea, but I am totally obsessed with this song. It's so...intense yet really cool. And why not put this when Christmas is only a little more than a week away? :)
Siriusly, so cute. I do somewhat support the pairing (although Isabella's obsession for him can get slightly annoying). Haha, and when Phineas goes, "Wait, wait, wait!" I wonder what he thinks of it.
