Who is your favorite Female Singer?

[eight]

Julie Christmas from Battle of Mice. Why? Simple.
MySpace.com - Battle Of Mice - Brooklyn, New York - Rock / Experimental / Metal - www.myspace.com/battleofmice

Listen.

[GreatOutdoors]

allison krauss
ruth moody, nicky mehta, and heather masse from the wailin' jennys
sabina sciubba from the brazilian girls
enya
joni mitchell

[stinkyattic]

On the topic of Mary J, I stumbled upon this whilst searching for something else... it's eye-opening!
YouTube - Mary J. Blige - "Vocal Range2-C6 (3.9 Octaves)"

[poseidon]

Currently; Sade, Clare Torry, Beth Gibbons etc etc.haha

[Silent Wolf]

Enya.

She seriously has the most beautiful voice i've ever heard in my life. When i go to bed i love to put on the headphones and just listen to her music. It's so relaxing and it just drifts me off to sleep.

[Rockerdoll]

Billie Holiday. Easy, hands down.

But other top choices are:
Janis Joplin
Grace Slick of Jefferson Airplane
Chrissie Hynde
Bonnie Raitt (and can she paly a mean guitar!)
Ella Fitzgerald

Nelly Furtado, Lucinda Williams, Stevie Nicks, and Shakira for their unique vocal styles

And for the modern pop-crowd:
Cristina Aguilera for sheer vocal control and power
Fiona Apple, because her delivery makes the little hairs on the back of my neck stand up.

They are all good.
I will add Karen O., of Yeah Yeah Yeahs. Amy Winehouse, Michelle Branch, and the two sisters from Karmina.
I just recently got into Karmina, but they have really good voices.