The guys from Chic wrote "Le Freak" as a message to a doorman who wouldn't let them into a club. Originally, it was "F--- Off."
The third verse of "Mmm Mmm Mmm Mmm" by Crash Test Dummies ("they shook and lurched all over the church floor...") was inspired by girl whose parents would speak in tongues at their Pentecostal service.
"Come Dancing" by The Kinks was inspired by the older sister of Ray Davies, who would make guys take her out dancing and spend their money on her, only to send them home frustrated with just a peck on the cheek.
Katy Perry co-wrote Iggy Azalea's hit single "Black Widow." Perry was originally going to sing on the track, but she couldn't fit it into her schedule, so Rita Ora provided the sung vocals instead.
The Doobie Brothers' swampy #1 hit "Black Water" is about the Mississippi River, evoking the rafting adventures Mark Twain and Huckleberry Finn.
"Bittersweet Symphony" by The Verve samples an obscure orchestral arrangement of the 1965 Rolling Stones song "The Last Time." The Verve had to sign away most of the royalties before they could release the song.
Zac tells the story of Hanson's massive hit "MMMbop," and talks about how brotherly bonds effect their music.
In this talk from the '80s, the Kansas frontman talks turning to God and writing "Dust In The Wind."
Did Marvin try out with the Detroit Lions? Did he fake crazy to get out of military service? And what about the cross-dressing?
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.
The man who created Yacht Rock with "Sailing" wrote one of his biggest hits while on acid.
Whether he's splitting ears or burning Nazis, Quentin Tarantino uses memorable music in his films. See if you can match the song to the scene.