In 1960 she sang 'Non, je ne regrette rien' (4)
I believe the answer is:
piaf
(Other definitions for piaf that I've seen before include "Edith -, Fr. cabaret singer (Non, je ne regrette rien)" , "See 6 Down" , "Edith -, twentieth century French cabaret singer" , "Edith, the "Little Sparrow"" , "French singer, the Little Sparrow, d. 1963" .)