Netflix's "Maria," starring Angelina Jolie, imagines opera singer Maria Callas' last days. The true story of her life was of abuse, drugs, and health issues.

Angelina Jolie really is singing opera in Maria, but it’s not only Jolie’s voice in the final product. The movie blended Jolie’s singing voice with recordings of the real Maria Callas, so the result is a hybrid of both Jolie and Callas’s voice.