According to the Google Edith Piat is credited twice for that movie with
C'etait une histoire d'amour.
And
Tu es partout

I remember it being used in an ad recently ish maybe it was rugby world cup? Or possibly a beer? I'm not sure. But i also recognised it from somewhere else.

I think it's the same artist... But I don't know if it's the same song. But I vaguely recollect a song being played in SPR that does sound like this.