[tokyoxjapanxfan]

I believe Avex told Ayu to change her setlist (because people are/were still unhappy with the fact that the majority of it was featuring Naoya) and Ayu didn't like that they wanted her to change it, so she decided that she wouldn't go on at all.

But then Max and her discussed it, and so then the 'coveted' last performer spot was given to Tohoshinki instead of Ayu.

And I think there were messages coming from Tohoshinki fans who were questioning Ayu's choice of Juno as her duet instead of Tohoshinki. (Which has absolutely no relation. Ayu doesn't have to pick Tohoshinki just because they're already established at Avex... she can collaborate with anyone she wants to, lol)