I was surprised to learn that John Denver's hit "Sunshine on My Shoulders" was conceived for a made-for-TV movie.
The feature was called Sunshine, and was a character study based on a real-life journal excerpted in the Los Angeles Times. It told the story of a terminal cancer case: a nonestablishment couple and the doctor who tried to save the young woman. CBS drew high ratings when they aired the film on November 9, 1973.
The soundtrack version was re-recorded in time for Denver's greatest hits album, and became his first number one hit. For my money, his best song will always be "Rocky Mountain High."