I think i like female singers better, i dunno why. I guess cuz they're mellower to listen to. Most guy singers aren't that mellow. Vanessa can make me high on melodies.
Faves would be : Vanessa, Cristina Scabbia from Lacuna Coil, Lacey Moseley from Flyleaf, Amy Lee from Evanescence, Kelly Clarkson, and Norah Jones.
Guys: Trent Reznor from NIN, Adam Gontier from Three Days Grace, Gerard Way from MCR, and David Draiman from Disturbed.