Paul McCartney wrote "Hey Jude" to comfort John Lennon's 5-year-old son Julian, whose parents were getting a divorce.
The video for Iggy Azalea's "Fancy" pays homage to the classic 1995 film Clueless with the rapper playing Cher and featured singer Charli XCX portraying Tai. It was filmed at some of the same locations used in the movie.
Aretha Franklin didn't drive, but one of her biggest hits was a car song: "Freeway Of Love."
"The Lion Sleeps Tonight" is an English version of a Zulu hunting song from the 1930s.
The bedrock of David Guetta's Nicki Minaj-featuring single "Hey Mama" is a sample of "Rosie," a 1940s prison recording from folk archivist Alan Lomax that songwriter Esther Dean first showed the French DJ on YouTube.
The guys who wrote "Take Me Out To The Ballgame" had never been to a baseball game but knew it was a good song topic.
Does he have beef with Gaga? Is he Sean Lennon's godfather? See if you can tell fact from fiction in the Elton John edition.
Iron Maiden, Adele, Toto, Eminem and Earth, Wind & Fire are just some of the artists with songs directly inspired by movies - and not always good ones.
Jon Fratelli talks about the band's third album, and the five-year break leading up to it.
Dean's saga began with "Ariel," a song about falling in love with a Jewish girl from New Jersey.
How the American gangsta rappers made history by getting banned in the UK.
The top Contemporary Christian artist of all time on song inspirations and what she learned from Johnny Carson.