What was the nickname of the French singer Edith Piaf?

Édith Piaf (19 December 1915 – 10 October 1963) was a French vocalist, songwriter, cabaret performer and film actress noted as France's national chanteuse and one of the country's most widely known international stars.

Piaf's music was often autobiographical and she specialized in chanson and torch ballads about love, loss and sorrow. Her most widely known songs include “La Vie en rose" (1946), "Non, je ne regrette rien" (1960), "Hymne à l'amour" (1949), "Milord" (1959), "La Foule" (1957), "L'Accordéoniste" (1940), and "Padam, padam..." (1951).

She was named Édith after the World War I British nurse Edith Cavell, who was executed 2 months before Piaf's birth for helping French soldiers escape from German captivity. Piaf – slang for "sparrow" – was a nickname she received 20 years later.

In 1935, Piaf was discovered in the Pigalle area of Paris by nightclub owner Louis Leplée, whose club Le Gerny's off the Champs-Élysées was frequented by the upper and lower classes alike. He persuaded her to sing despite her extreme nervousness, which, combined with her height of only 142 centimetres (4 ft 8 in), inspired him to give her the nickname that would stay with her for the rest of her life and serve as her stage name, "La Môme Piaf" (Paris slang meaning "The Waif Sparrow" or "The Little Sparrow"). Leplée taught her the basics of stage presence and told her to wear a black dress, which became her trademark apparel. Later, she would always appear in black.