Mark Ronson's "Uptown Funk" was the first US chart-topper to include the word "funk" in the title.
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."
Pat Benatar's "Hit Me With Your Best Shot" was written by a guy named Eddie after going through a weird therapy session where he punched pillows to get out his aggressions.
Johnny Cash's wife, June Carter, wrote "Ring Of Fire" about their relationship.
"On The Floor" by Jennifer Lopez samples the 1989 song "Lambada," which you might remember is about "The Forbidden Dance."
The Kate Bush song "Why Should I Love You?" is a collaboration with Prince. He completely re-worked her demo, so Bush spent a lot of time piecing it back together to keep her imprint.
Before "Rap" was a form of music, it was something guys did to pick up girls in nightclubs. Donnie talks about "The Rapper" and reveals the identity of Leah.
A Soul Train dancer takes us through a day on the show, and explains what you had to do to get camera time.
Don breaks down "Hotel California" and other songs he wrote as a member of the Eagles. Now we know where the "warm smell of colitas" came from.
Tyler talks about his true love: songwriting. How he identifies the beauty in a melody and turns sorrow into art.
Danny played guitar on Sweet Baby James, Tapestry, and Running On Empty. He also co-wrote many hit songs, including "Dirty Laundry," "Sunset Grill" and "Tender Is The Night."
It took him seven years to recover from his American hit "Fool (If You Think It's Over)," but Chris Rea became one of the top singer-songwriters in his native UK.