It was a show so epic, it couldn't fit into one hour. In a clip that never aired, Celine performed "If I Could," a song she described as a tribute to her son René-Charles, from Las Vegas.
From Celine Dion to Billy Crystal, these 15 stars will go down in history as the celebrity guests who visited The Oprah Show most often.
Trivia on 'The Oprah Winfrey Show'.
Pema Chodron, the first American woman to become a fully ordained Buddhist nun in the Tibetan tradition and author of When Things Fall Apart, talks to Oprah about learning from pain and what it means to be a Buddhist.
See what some of Oprah's most famous guests have to say to her during her final season.