who is the best girl singer?

Carrie Underwood

Kate Bush
Enya

Wouldn't say the greatest, more like unique

the princess avril lavigne

Diana Krall and Norah Jones.

Celine Dion

I think that Celin dion has the best voice in europe .. she's voice is like an angel . I like her songs .

Enya.

Perfect pitch and control.

Angela Gossow
from
Arch Enemy
http://www.perfectpitchonline.com/ba...arch_enemy.jpg

Tina Arena
Amy Lee

Imogen Heap has an amazing voice. If you haven't heard it check it out, there's a couple of videos up on youtube.