Train's guitarist had to Google an instructional video to learn how to play the ukulele for "Hey Soul Sister."
George Michael was 17 and on a bus to his job at the cinema when he came up with the idea for "Careless Whisper" and the lyrics, "Something in your eyes calls to mind a silver screen."
"I Swear" was a #1 country hit for John Michael Montgomery before All-4-One made it a #1 pop hit.
"Girl Crush" by Little Big Town came from the hashtag #girlcrush, which its co-writer, Lori McKenna, spotted on Instagram.
Kylie Minogue's "Can't Get You Out Of My Head" received more airplay during the 2000s than any other song in the UK.
Paul McCartney based the "Eleanor Rigby" story on old ladies he met at his housing estate. He saw how sometimes when they died, nobody really noticed.
Here's what happens when an opening act is really out of place with the headliner, like when Beastie Boys opened for Madonna.
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.
The "Lowdown" and "Lido Shuffle" singer makes a habit of playing with the best in the business.
