 Among those who recorded his songs are Dalida, Roger Whittaker, Petula Clark, Vicky Leandros, Paul Mauriat, Nana Mouskouri, Claudine Longet, German Montero, Jean-Claude Annoux and Enrico Macias.In the 1960s, he co-wrote (with André Popp) three songs for the Eurovision Song Contest – Tom Pillibi, which won the competition for France in 1960, Le chant de Mallory which came forth for France in 1964 and L'Amour Est Bleu ("Love is Blue") which came forth for Luxembourg in 1967.In the late 1960s he began a collaboration with Roger Whittaker which wrote the songs (English release)