Nanette Workman & Tony Roman
I was in such a record-buying frenzy in Montreal that I didn't even realize this was a Nanette Workman album until I got home and had time to look it over. Fleurs d'amour, Fleurs d'amitié, credited simply to "Nanette" but actually a duo effort alongside Tony Roman, was released in 1968. It was a collection of a number of duet singles ("Hey Joe," "Mercy, Mercy," "Fleurs d'amour, fleurs d'amitié," etc.) Tony & Nanette (as they were billed) recorded together, plus some original material Nanette performed on her own.
"Tu t'en iras" (which I think translates as "you will leave" or "you are welcome to leave") is actually a gorgeous cover of "Angel of the Morning", a 1968 Merrilee Rush tune best-known as a 1981 hit for Juice Newton (there's also a really good reggae version by Joya Landis). "Mercy, Mercy" is likewise not a cover of the Rolling Stones tune (originally by Don Covay), but of "Mercy, Mercy, Mercy," by jazz pianist Joe Zawinul. It was re-recorded, with lyrics added, in 1967 by The Buckinghams, so this is probably a cover of that version. And "Petit Homme" is a more traditionally French-sounding number with a cool echoing refrain on trumpet and what sounds like a kazoo.
PS - There's more '60's-era Nanette Workman to be had here, courtesy of Babette's Feast.