Françoise Madeleine Hardy
While it’s a little campy and sugary sweet most of the time, it smoothed me out and allowed some tedious stuff to happen pretty naturally and without friction.
Since I have forgotten a lot of the French I took in high school, you don’t need to worry about the lyrics of the songs unless you really want to and can remember all of it. It’s pretty basic stuff and easily understood (no run-in mushy style French, eh?)
Give her stuff a go.