Marie-France Dufour or Marie ( 8 August 1949 in Nancy &ndash; 18 October 1990 ) was a French singer . She made her hit '' Sun '' in 1971 , but she is probably best known for representing Monaco in the Eurovision Song Contest 1973 in Luxembourg by song " Un train qui part " . She was also featured in Les Misérables as Éponine . She died of leukemia at the age of 41 in 1990
Eurovision Song Contest 1973
Eurovision Song Contest 1973
Marie-France Dufour