Madonna
Ayu said that one herself a couple of times. AT02 is basically a poor man's Drawned World Tour and a lot of the early eletronic stuff Ayu did was based on Ray of Light and Music albums. Also, the theatrics, catholic symbolism and the concerts totally set around the same concept.
Ray of Light:
https://www.youtube.com/watch?v=o8VO...297A48938DF34A
Kylie Minogue
Maybe it's just me, but the dance break from this performance reminds me a lot of AT07 appears
Michael Jackson
In the corner during AT09 was obviously based on him!