Question: What Canadian vocalist was featured in a guest appearance on the album Haven by Kamelot?
Sentence (from "Alissa White-Gluz"): Alissa White-Gluz ( ; born July 31, 1985) is a Canadian vocalist, best known as lead vocalist of the Swedish melodic death metal band Arch Enemy, and former lead vocalist and founding member of the Canadian metal band The Agonist.
Relevant evidence: Yes