Sissy Spacek is one of these three artists: 1) Sissy Spacek is John Wiese and Charlie Mumma (Human Agony, ex-Knelt Rote). Based out of LA, their music goes from harsh noise and noisecore to musique concrète and free improvisation. 2) It may also be a hi-fi ambient art-pop band (late 90's-2002) from Helsinki, Finland. 3) http://en.wikipedia.org/wiki/Sissy_Spacek Mary Elizabeth "Sissy" Spacek (born December 25, 1949) is an Academy Award–winning American actress and singer.