Alissa White Gluz  (born 31 July 1985) is a Canadian vocalist, best known as the lead vocalist of the Swedish melodic death metal band  Arch Enemy and former lead vocalist and founding member of the Canadian metalcore band  The Agonist.  Her vocal style includes both growling and clean vocals (singing). Although primarily associated with melodic death metal and metalcore, she has appeared as a guest vocalist for power metal, symphonic metal and deathcore bands, notably  Kamelot,  Delain and  Carnifex and has performed live with  Nightwish and  Tarja Turunen.