East:
BIG MAMA!!!: No explaination needed!
TiA: I love her voice & her Humming album
alan: Love her ability to wail & overall music
keiko such a unique voice!
DBSK/Tohoshinki Oh come on, they are like the Korean version of Boys II Men!
Namie Amuro: Can really sing a ballad (Will, Baby Don't Cry,etc)
Coco Lee: Considered the Mariah Carey of Asia and I can see why!
Jasmine Her voice is really strong
West (just listen to them and you'll know why!):
Mariah Carey 
MY VOCAL IDOL!!!
Whitney Houston....the singing legend
Sade
Phyllis Hyman
Lisa Stansfield
Michael Jackson
Amy Lee
Luther Vandross
Couldn't name just one!