Didier René Henri Barbelivien (born 10 March 1954 in Paris) is a French author, lyricist, songwriter and singer. Beginning in the 1970s, he wrote a number of successful songs for artists such as: Dalida, Johnny Hallyday, Michel Sardou, Daniel Guichard, Claude François, Gilbert Montagné, Sylvie Vartan, Patti Layne, Gilbert Bécaud, Enrico Macias, Demis Roussos, Mireille Mathieu, Hervé Vilard, Michèle Torr, C. Jérôme, Christophe, Julio Iglesias, Sheila, Nicole Croisille, Patricia Kaas, Éric Charden...