I'm very picky when it comes to women singing in metal - power/symphonic metal to be exact. She has to be extremely good, to my ears, in order for me to like her. I tend not to like females in my metal, I don't really listen to rock extensively. But from what is on my ipod that I can recall at the moment, which I believe is all the female singers I like are:

Bridget Fogle in The Infinite Wonders of Creation - Luca Turilli

Heidi Parviainen the lead singer of Amberian Dawn


I like female artists far more in the electronic genre than metal. Their voices, to me, tend to match better with electronic than metal.