If you watch American Horror Story: Asylum, you may know the song Dominique. What you may not know is that it is a cover of a song from Souer Sourire, known as The Singing Nun.
Sourire gave most of the money earned from the song to her religious order, who then expelled her, likely for her controversial social work and advocacy of the contraceptive pill . She lived out the rest of her life with her long-life friend and lover, Annie Pecher, before the two met a sad end. They are buried together in Belgium, where they lived.
(thanks to @silverlady7!)