Much Icelandic music is related to Nordic music, and includes folk and pop traditions. Notable Icelandic music acts include medieval music group Voces Thules, alternative and indie rock acts such as The Sugarcubes, Sóley and Of Monsters and Men, jazz fusion band Mezzoforte, pop singers such as Hafdís Huld, Emilíana Torrini and Björk, solo ballad singers like Bubbi Morthens, and post-rock bands such as Amiina and Sigur Rós. Independent music is strong in Iceland, with bands such as múm and solo artists.