Marjana Lipovsek, mezzo-soprano Marilyn Horne, mezzo-soprano Ameral Gunson, mezzo-soprano Hertha TOpper,mezzo-soprano Jean Temperley, mezzo-soprano Magdalena Kozena, mezzo-soprano Marta Lukin, mezzo-soprano Stefania Toczyska, mezzo-soprano Christa Ludwig, mezzo-soprano Elina Garanca, mezzo-soprano