Jeane Dixon

A Roman Catholic, Jeane Dixon believed she had a gift from God that allowed her to foretell the future. In 1956 she predicted that a Democrat would win the 1960 presidential election, and that he would be assassinated while in office. When John Kennedy was killed, Dixon became famous. In 1965 a book about Dixon sold millions of copies, and she became a syndicated newspaper columnist, delivering horoscopes and advice. For many years supermarket tabloids relied on Dixon's annual predictions, most of which didn't come true.

Extra credit: For a short time, Dixon was an advisor to Ronald and Nancy Reagan.