Diamanda Galás (born August 29, 1955) is an American musician and visual artist. Her commitment to addressing social issues and her involvement in collective action has made her concentrate on themes as diverse as the AIDS epidemic, mental illness, despair, loss of dignity, as well as political injustice, historical revisionism and war crimes, among much else. Galás has attracted the attention of the press particularly for her voice – a soprano sfogato – and written accounts that describe her work as original and thought-provoking refer to her as "capable of the most unnerving vocal terror", an "aesthetic revolutionary", "a mourner for the world's victims" and "an envoy of risk, honesty and commitment".