Thirteen Women

This is an oldie but a goodie, albeit a short one - one of the other comments explains what happened, but no one knows the reason.

Myrna Loy is very beautiful and exotic as Ursula Georgi (which I actually think is an Italian name) who is a half-caste seeking revenge on sorority sisters who kept her out of their group. She uses the power of suggestion, switching their actual horoscopes by mail that they receive from a swami with predictions of doom. One by one, the women die. She ultimately knocks off the swami and turns her sights on the disbeliever of the group, played by Irene Dunne.

Loy would soon break free from exotica with "The Thin Man" series. Mrs. Laurence Olivier at the time, Jill Esmond, appears in the film, as do Ricardo Cortez and Peg Entwhistle. For Entwhistle, the dire predictions in the film played out in real life for her. Shortly after this movie was made, she achieved a lasting fame by committing suicide by jumping from the "Hollywoodland" sign in Los Angeles.