Cia Hedmark. For the most part, I fucking hate female vocalists. So many of them just sound like dung to me. Who was that girl who did vox on some of the older Dark Tranquillity albums? She wasn't too bad.
Anneke, Synne and the Evardsen sisters. They're among the few that can actually carry a riff-laden song and they have remarkable voices. Female backing vocals in black metal and stuff are mostly gay.