Born in Paris, France, Marie Dubas began her career as a stage actress but became famous as a singer. Using the great Yvette Guilbert as her model, Dubas started singing in the small cabarets of Montmartre mixing comedy into her routine. She earned a following that led to offers to perform in Parisian operettas and musicals and during the 1920s and 30s, starred at such places as the Casino de Paris and Bobino, the great music hall in Montparnasse. Her most famous song, Mon légionnaire, was written by Raymond Asso and recorded in 1936. Her popularity became such that in 1939 she toured the United States.

The occupation of France by the Germans during World War II proved a difficult time for the Jewish, Marie Dubas. Although married to a French gentile who served in the Air Force, she was nevertheless banned by the Vichy government and placed under house arrest by the Gestapo who raided her Paris apartment. Forced to flee the country, Dubas took refuge in Lausanne, Switzerland where she remained until the end of the war. On her return to France, she learned her sister had been executed and her nephew had been shipped to a concentration camp, never to be heard from again.

The inspiration for Édith Piaf, Marie Dubas returned to performing and in 1954 was chosen as a headliner for the reopening of the Paris Olympia.