Sylvie Vartan ( born 15 August 1944) is a French singer of Bulgarian origin. She was one of the first rock girls in France. Vartan was the most productive and active of the yé-yé style artists, considered as the toughest-sounding of those. Her performance often featured elaborate show-dance choreography. She made many appearances on French and Italian TV. Yearly shows with her husband at the time Johnny Hallyday attracted full houses at the Olympia and the Palais des congrès de Paris throughout the 1960s and Mid-1970s. After a break in performances, she began recording and giving concerts of jazz ballads in the French speaking countries again in late 2004.