Carol Patricia Mas (born October 20, 1955), professionally known as Carolyne Mas, is an American singer-songwriter, guitarist, pianist, and producer. She broke out of the Greenwich Village music scene boom of the late 1970s, along with other artists such as Steve Forbert, The Roches, and Willie Nile. Although she remains relatively unknown in the United States, except for a loyal cult of fans, she managed to gain popularity in Europe and Canada, mostly due to the use of television as a promotional tool in these markets. Her records did well in the charts in Canada, but her greatest success was in Germany, where a live album, Mas Hysteria, was released by Phonogram. It was originally intended to promote her upcoming appearance on Rockpalast in January 1981, and included her most significant hit, Sittin' in the Dark.