Jessie J had a lyric from her song "Who You Are" tattooed on her hip, but she spelled "lose" incorrectly so it reads: "Don't loose who you are in the blur of the stars."
The lyrics for "Mary, Did You Know?" were written by Christian singer and comedian Mark Lowry, after his pastor asked him to write a Christmas musical for their church. Southern gospel musician Buddy Greene later added music to his words.
The song "Grease," sung by Frankie Valli in the 1978 movie, was written by Barry Gibb of The Bee Gees.
Originally a chart-topper for Steve Lawrence in 1962, "Go Away Little Girl" became the first song of the rock era to hit #1 for two different artists when Donny Osmond's cover version also reached the summit in 1971.
Michael McDonald's "I Keep Forgettin'" is based on a '60s song with the same title written by Jerry Leiber and Mike Stoller.
After the Beastie Boys sampled a bunch of Led Zeppelin songs, Robert Plant did it himself on his 1988 solo hit "Tall Cool One," which sampled "Whole Lotta Love," "Black Dog" and "The Ocean."
Rosanne talks about the journey that inspired her songs on her album The River & the Thread, including a stop at the Tallahatchie Bridge.
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.
Taylor talks about "The Machine" - the hits, the videos and Clive Davis.
When Judd Apatow needed under-appreciated rockers for his Knocked Up sequel, he immediately thought of Parker, who just happened to be getting his band The Rumour back together.
Known in America for the hit "If You Leave," OMD is a huge influence on modern electronic music.
Vince Gill, Emmylou Harris and Lyle Lovett are just a few of the artists who have looked to Clark for insightful, intelligent songs.