Yes, '67, six years before Bowie covered Brel on the stench of fish and whores in Zeebrugge. (A syllable was added and Amsterdam was used as "it sounded better to the ear")
(Les Horribles Cernettes lineup appears to have been far more anglophone than francophone over the years, but all of them —as it was a founding member in 1954– have at least tenuous ties to belgium)
I'd have guessed he invented Boggle, the intertubes have that at 1972, 18 years earlier.
I have no words for the French here in '67: https://www.youtube.com/watch?v=3LZbw6YCcm4