The song "Grease," sung by Frankie Valli in the 1978 movie, was written by Barry Gibb of The Bee Gees.
The opening lines to "Free Bird," "If I leave here tomorrow, would you still remember me?" came from the girlfriend of Lynyrd Skynyrd guitarist Allen Collins, who asked him that question during an argument.
There really is a China Grove (in Texas), but Tom Johnston didn't know about it when he wrote the Doobie Brothers song.
Lil Wayne does an unlikely rap in a remix of the Joe Jonas song "Just In Love." The pair met at the 2008 MTV Video Music Awards.
The Hollies hit "The Air That I Breathe" was written in part as a reaction to the smog in Los Angeles.
"Thinking About You" was the ninth track from Calvin Harris' 18 Months album to enter the UK singles Top 10. No other artist has obtained so many hits from one LP - Michael Jackson was the previous record holder with seven Top 10 tunes from both his Bad and Dangerous sets.
We've heard of artists putting their hearts into their music, but some take it literally.
Phil was a songwriter, producer and voice behind many Philadelphia soul classics. When disco hit, he got an interesting project: The Village People.
Director Mark Pellington on Pearl Jam's "Jeremy," and music videos he made for U2, Jon Bon Jovi and Imagine Dragons.
Do you know the girl singer on Eminem's "Stan"? If so, this quiz is for you.
Johnny Depp, Angelina Jolie, Mila Kunis and John Malkovich are just a few of the film stars who have moonlighted in music videos.
When she released her first album in 1988, Tanita became a UK singing sensation at age 19. She talks about her darkly sensual voice and quirky songwriting style.