This isn't about the most beautiful voice, just the one you like best. Any answer is appropriate, just try to not suck too hard at it. :D
Okay, here are a few of mine:
Margo Timmins - Lead singer of the Cowboy Junkies and her voice just makes me weak in the knees. There's something about it I can't get enough of.
Chrissie Hynde - Lead singer of the Pretenders. To me, her voice is just pure sex.
Natalie Merchant - Adorable.
Aimee Mann - Just the right amount of throaty and thoughtful.
Diana Ross - Probably my favorite female voice of all time but only during her run with The Supremes. I don't know if it was the technology at the time or the style of music but her later stuff doesn't do it for me.
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