"The Long and Winding Road" was the last of The Beatles' 20 #1 hits in America. Written by Paul McCartney, he said it's a sad song about "the door you never quite reach."
Sting wrote "Every Breath You Take" at the same desk in Jamaica where Ian Fleming wrote his James Bond novels.
A pre-famous Rupaul is in the video for "Love Shack" by The B-52s. He had a solo hit with "Supermodel" a few years later.
"Airplanes" by B.o.B was written by Lupe Fiasco, who recorded it but decided to pass.
"Forever" by Chris Brown was written for a Wrigley's Doublemint Gum commercial. The full song contains the gum's tagline: "Double your pleasure, double your fun."
Lady Gaga is a big fan of horror movies; listen for the names of these three Alfred Hitchcock films in the lyrics to "Bad Romance": Psycho, Vertigo, Rear Window.
Before he was the champ, Ali released an album called I Am The Greatest!, but his musical influence is best heard in the songs he inspired.
The former Metallica bassist talks about his first time writing a song with James Hetfield, and how a hand-me-down iPad has changed his songwriting.
A top session musician, Carol played on hundreds of hits by The Beach Boys, The Monkees, Frank Sinatra and many others.
A popular contemporary folk singer, Williams still remembers the sticky note that changed her life in college.
An original member of Depeche Mode, Vince went on to form Erasure and Yaz.
Rob Halford dives into some of his Judas Priest lyrics, talking about his most personal songs and the message behind "You've Got Another Thing Comin'."