Don't know if this has been reported here yet, but ayu retweeted an article of Gackt. Apparently he covered SEASONS (arranged cover) and even shot a music video for it.
https://www.barks.jp/news/?id=100013...mpaign=tw_auto
And @truehappiness, yeah I love it when I spot people I know in her concerts! TK attended AT15 apparently, I just caught a glimpse of him in the audience.