I have a .jp e-mail address
and i dont think her address would have "Ayumi Hamasaki" in it.
It'd be like..
"omfgiamayuandyouarenot@yahoo.com.jp"

EDIT: LOL DevilAyu, i posted mine before you said that.
It's common sence, really.
But yeah, 1993...that person is 12 years old.
I know kids who do stuff like that.

EDIT: LOL i have an idea.
I'm going to scare the crap out of that kid.
I'll post the message when i get it back