I'm going crazy for months now looking for a recording of a French song with the chorus "S'wonderful, s'wondeful..."

It's *not* the Gershwin "S'wonderful, s'marvellous" one. This is a different song, with a fast talky bit and then the great chorus. They keep using it on car ads - currently Toyota - on this side of the Atlantic, which is driving me even crazier.

What is it? Please!