Simen Hestnæs (born March 4, 1974, in Oslo, Norway), also known as ICS Vortex, or just simply Vortex, was the vocalist of the avant-garde metal band Arcturus and is the bass player and clean vocalist for the Norwegian symphonic black metal band Dimmu Borgir. He was most recently announced to be the new vocalist for Norwegian/English black metal band Code,[1] replacing Kvohst who has gone on to become the vocalist of Dødheimsgard.