November 7, 1951 - Frank Sinatra marries his second wife, actress Ava Gardner. The marriage, her third, lasts six years and is credited for moving Sinatra into his "mature" phase as a singer, with Nelson Riddle stating: "It was Ava who did that, who taught him how to sing a torch song. That's how he learned. She was the greatest love of his life and he lost her."