I heard (recently?) that TRF had expressed feelings to Ayu that they wanted to go last, as they're friends, Ayu asked a-nation organizers to make the change, and as they're the oldest performers at a-nation, Ayu was also upset when they were not allowed to do so, instead it was given to DBSK.
But I don't have anything to back up these claims. Just 2ch stuff.
JUNO is the brother of one of the former DBSK members, and now there's an uneasiness between the current members, who refused to switch labels in Korea, and JYJ, who did switch labels, thus removing themselves from DBSK. So there was weird pressure going on behind the scenes of the labels and label mates.
Ayu was upset because he's featured in her song and can't even perform one song with her on stage. Which makes sense, but it was out of her hands. Obviously labels always have the stronger hand haha.
I mean, before the song was released Ayu was even getting tweets from DBSK fans who were all "Why not collaborate with a DBSK member instead of their brother???"--which is a stupid argument, as she can collaborate with whomever she wants to, lol.
ANYWAY, I'm excited for Sunday. Actually it's cool because I don't know any tracklist yet.