Are you sure you are not thinking of Charles Trenet? It is indeed a fabulous song, but I have never heard Aznavour singing it.
https://www.youtube.com/watch?v=d5rBUPEeUyQ
My wife was with a group in Paris years ago and the head honcho had booked a suite. Charles Aznavour was staying in the room the previous night and was supposed to check out at midday. The hotel were reluctant to evict a national treasure and he knew it. He was still there at 2 pm so each member...