Moustaki met Edith Piaf in the late 1950s and was soon writing songs for the legendary singer, including "Milord".
By the late 1960s, Moustaki was an established singer with hits such as "Le Meteque" and "Ma Liberte", even as he continued to write for other vocalists, among them, Yves Montand.
Suffering from a lung ailment, Moustaki retired from performing after a January 2009 concert at the Palace of Music in Barcelona.
"I have had a passionate life. I hope it will be that way until the end," he said in 2011.