The Boyz II Men hit "It's So Hard To Say Goodbye To Yesterday" is an a capella cover of a song from 1975 by G.C. Cameron that was used in the movie Cooley High to express the feeling of parting ways with high school friends.
Elton John's "Rocket Man" is based on a Ray Bradbury story called The Rocket Man published in 1951.
"It's the End of the World As We Know It (And I Feel Fine)" was inspired by a dream where Michael Stipe conjured up images of people with the initials L.B.: Lester Bangs, Leonid Breshnev, Lenny Bruce and Leonard Bernstein.
"Uptown Funk" by Mark Ronson was 2015's best-selling single in both the U.S. and U.K.
Jack & Diane started off as an interracial couple; Mellencamp took race references out of the song at the request of his record company.
Ariana Grande's hit "Problem" started off as a track written by One Direction songwriter Savan Kotecha. He gave it the working title of "The Whisper Song," after a 2005 Ying Yang Twins hit.
Did Al play on a Beach Boys record? Did he have beef with George Lucas and Coolio? See if you can spot weird but true stories.
In 1986, a Stephen King novella was made into a movie, with a classic song serving as title, soundtrack and tone.
When Dave recorded the first version of the song with his group the Blasters, producer Nick Lowe gave him some life-changing advice.
Beef with Bon Jovi? An unfortunate Spandex period? See if you can spot the true stories in this Metallica version of Fact or Fiction.
The man who brought us "Red Skies" and "Saved By Zero" is now an organic farmer in France.
Not everyone can be a superhero, but that hasn't stopped generations of musicians from trying to be Superman.
