Ayu's always the best.
Awesome and motional vocal
Good costumes
Cool tricks
Kuu is nice too but she tends to have fun more than to sing. Her costumes aint that good but her tricks are very very nice.
Namie's better than Kuu cause of the bloody good vocal and extreme dancing. But yea, that gets boring.
Utada, well, boring, bad costumes, nice vocal but that's just it
