ABBA's Bjorn Ulvaeus and Benny Andersson conceived "Dancing Queen" as a dance song with the working title "Boogaloo," drawing inspiration from the 1974 George McCrae disco hit "Rock Your Baby." Their manager Stig Anderson came up with the title "Dancing Queen."
Jay-Z's "Hard Knock Life (Ghetto Anthem)" is based on the song "It's A Hard Knock Life" from the Broadway play Annie.
There really is a China Grove (in Texas), but Tom Johnston didn't know about it when he wrote the Doobie Brothers song.
Before recording "Boom Clap" herself, Charli XCX offered the song to Hilary Duff, but her people turned down the tune because it "wasn't cool enough for Hilary."
"Do They Know It's Christmas?" by Band-Aid was the first big group charity single. It was organized by Bob Geldof, who a year later put together "We Are The World" and Live Aid.
When Keith Urban played "Somebody Like You" for his girlfriend, she called him a hypocrite because he "sucked at relationships."
Inspired by his dear friend, "Seasons in the Sun" paid for Terry's boat, which led him away from music and into a battle with Canadian paper mills.
Can you be married in one country but not another? Only if you're part of a gay couple. One of the first famous singers to come out as a lesbian, Janis wrote a song about it.
Bridesmaids, Reservoir Dogs, Willy Wonka - just a few of the flicks where characters discuss specific songs, sometimes as a prelude to murder.
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."
Beef with Bon Jovi? An unfortunate Spandex period? See if you can spot the true stories in this Metallica version of Fact or Fiction.
Greg talks about writing songs of "universal truth" for King Crimson and ELP, and tells us about his most memorable stage moment (it involves fireworks).