February 28, 1948, he accompanied
Suzy Delair on the piano at the Hotel Negresco when she sang the French song "C'est si bon" during the first "Nice Jazz Festival".
Louis Armstrong was present and loved the song. June 26, 1950, he recorded the American version of the song in New York with
Sy Oliver and his Orchestra. When it was released, the disc was a worldwide success and the song was then performed by the greatest international singers.