Abdominal aortic aneurysm
Actress Lucille Ball died April 26, 1989 from an abdominal aortic aneurysm. At the time of her death, she was in Cedars-Sinai Medical Center recovering from emergency surgery performed just six days earlier because of a dissecting aortic aneurysm near her heart. Ball was at increased risk, as she had been a heavy smoker for decades.
Jack Benny
Despite his failing health, Benny made several appearances on "The Dean Martin Celebrity Roast" in his final eighteen months, roasting Ronald Reagan, Johnny Carson, Bob Hope and Lucille Ball, in addition to himself being roasted in February 1974. His roasting of Lucille Ball was his last public performance, and aired on February 7, 1975, several weeks after his death.