For anyone interested in French popular entertainment during, more or less, the era of the Third Republic, the following website will be of enormous interest and importance:
http://www.dutempsdescerisesauxfeuillesmortes.net/An explanation of the name: «Le temps des cerises» was a song written in 1868 that was eventually associated with the short-lived Commune of 1871. «Les feuilles mortes» was a song of 1945 that became well-known in English as "Autumn Leaves".
To access the biographical sections:
http://www.dutempsdescerisesauxfeuillesmortes.net/menus/3a_fiches_biographiques.htmWant to know how more about Félix Mayol? Or how many records Tino Rossi made up to 1955? And what about artists whose active years predated the phonograph, like Mlle Agar? You'll find all of them covered. The site's editors made a deliberate decision to include only basic information about some later singers whose careers are thoroughly documented elsewhere, like Édith Piaf and Yves Montand, but otherwise almost any question you have about French singers of the early 20th century will be answered. (If you read French, or at least can decipher Google's messy translations!)
-HA