The fourth and last wife: Barbara Marx
So many marriages, so many women - but only Barbara, who he met in 1973, was exactly the right one. He found her so mature, beautiful and wise that he gave her a 17-carat diamond engagement ring. In her autobiography "Lady Blue Eyes," she wrote: "I was his companion, consultant, muse, psychiatrist and lover." They married in 1976 and stayed together until Sinatra's death in 1998.