Elton John's "Rocket Man" is based on a Ray Bradbury story called The Rocket Man published in 1951.
Pink wrote "Just Give Me A Reason" about how one partner can feel jilted over something trivial, like how her boyfriend passes her the butter.
One of the most successful cover songs is Fugees' "Killing Me Softly," a 1996 reworking of Roberta Flack's 1973 hit. Originally, Fugees wanted to change the title to "Killing Him Softly" and make it about the dangers of drug abuse.
Bruce Springsteen originally wrote "Fire" for Elvis Presley in 1977, and even sent him a demo. Sadly the King died before he ever heard it, and it was left to the Pointer Sisters to record the song.
Will.I.am, literally dreamt up "I Gotta Feelin'." Said the Black Eyed Pea: "Have you ever had a dream where there's a melody in your dream? I'll wake up out of my sleep and record that! 'I Gotta Feelin' was one of those songs."
"Ain't No Sunshine" by Bill Withers was inspired by the Jack Lemmon movie Days of Wine and Roses.
The original voice of Snap! this story is filled with angry drag queens, video impersonators and Chaka Khan.
The Creed lead singer reveals the "ego and self-fulfillment" he now sees in one of the band's biggest hits.
Roger reveals the songwriting formula Clive Davis told him, and if "Eight Miles High" is really about drugs.
John tells the "St. Elmo's Fire (Man In Motion)" story and explains why he disappeared for so long.
Collaborating with T Bone Burnett, Leslie Phillips changed her name and left her Christian label behind - Robert Plant, who recorded one of her songs on Raising Sand, is a fan.
