Okay, this is what I picked up. When he was performing, people barely noticed. And some that did, they didn't like it, hence the throwing water on him, etc. But he didn't quit. And the girl that was shown throughout represented a true XO fan that had liked him since the beginning and will always love his music. Him doing the sing represents his career, and how he was well into it when people finally started liking it and noticing it. And the man throwing the lighter represented him being the hot new thing, even though he's been doing for a while now. And the dance represent how he tries to reflect MJ in his style.