There are quite a few musicians who have made their careers based on comedy. Until today I had never known of a musician who became famous because they were so ear-shatteringly horrible that people came out in droves to laugh at them.
The first sentence in Florence Foster Jenkins' Wikipedia entry is, "Florence Foster Jenkins (July 19, 1868 – November 26, 1944) was an American soprano who became famous for her lack of rhythm, pitch, tone, and overall singing ability."
Jenkins' confidence in herself was unwaivering. She claimed that her critics were merely jealous of her talent. The heartly laughter coming from the audience while she was singing, she said, was from her rivals.
You be the judge.