Sidsel Endresen (born June 19, 1952) is a Norwegian jazz singer from Oslo, Norway. She is one of those creative vocal artists who are extremely difficult to describe properly. Her music often has some electronic backing, some jazz elements, some folk elements, some non-mainstream-pop elements, and an experimental flavour but doesn’t fall into the styles of music usually called experimental. She has a deep, haunting voice and she sings music full of ripples of sound, connotation, and allusion.