[ayumisrael]

I do recall that when Britney injured her leg in one of her past concerts she cancelled the show, while when ayu fell into 2 meters tall hole and injured hard her legs and should've rested she came on the same evening and performed like a diva and wasn't whining cancelling shows for that.
And let's not forget that ayu is keeping on hearing just with 1 ear.

Britney might be one of the biggest pop stars on earth (and she was my favorite artist until I knew kumi/jpop) though in that aspect we really shouldn't compare that to ayu since no japanese artist is (and probably will never be) as popular as Britney in the world. But she comes nowhere near ayu in any artistical, proffessional or appreciation aspects and also talent.
The only thing she might do better than ayu is dancing Britney got talent for that. Besides that though ayu takes her in every aspect imo.