Marilyn Monroe had a really great voice - I was reminded again today when I heard a recording of her "River of No Return." It's really something. This video is clearly someone's attempt to circumvent copyright laws by putting the audio recording version on top of her performance in the movie. But the audio recording is the thing.
And you can add the movie "River of No Return" to the list of dramatic roles that Arthur Miller was unaware of or ignored when he claimed that her first dramatic role was "The Misfits."