Artemios "Demis" Ventouris-Roussos (English: /ˈruːsoʊs/; 15 June 1946 – 25 January 2015) was a Greek vocalist and performer who had an internationally acclaimed career, as a single recording artist and bandleader. As a band member he is best remembered for his work in the progressive rock music act Aphrodite's Child, but as a vocal soloist, his repertoire included hit songs like ‘’Goodbye, My Love, Goodbye’’, ’’From Souvenirs to Souvenirs’’ and ’’Forever and Ever’’.