(Has anyone posted this? If so, my apologies.)

Serge Gainsbourg, as we know, already made reference to Guerlain in his song "Initials BB" but here is a advertising jingle, sung by Gainsbourg and his wife Jane Birkin, for Caron's Le Troisieme Homme.

Go the page on the men's section and select Le Troisieme Homme. You can download the jingle. It may also launch from the main menu.