Jay-Z's "Hard Knock Life (Ghetto Anthem)" is based on the song "It's A Hard Knock Life" from the Broadway play Annie.
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."
"Oh Happy Day" was recorded in a church and sold to raise money for the choir. It's the only genuine gospel song to become a pop hit.
"Heaven Is A Place On Earth" writer Ellen Shipley got the idea for the song from a gas station greeting card that said "Heaven On Earth."
Chaka Khan's hit "I Feel For You" was written and originally recorded by Prince four years before she covered it.
Snow Patrol had a huge hit in 2006 with the love song "Chasing Cars." The title alludes to how dogs chase cars just for the thrill of it, the same way two people deeply in love will embark on open-ended adventures, content to be in each others' company with no clear destination.
Bowie's "activist" days of 1964 led to Ziggy Stardust.
The Guns N' Roses rhythm guitarist in the early '90s, Gilby talks about the band's implosion and the side projects it spawned.
Bridesmaids, Reservoir Dogs, Willy Wonka - just a few of the flicks where characters discuss specific songs, sometimes as a prelude to murder.
Rob Halford, Richie Faulkner and Glenn Tipton talk twin guitar harmonies and explain how they create songs in Judas Priest.
An interview with Ray and Derek Shulman of the progressive rock band Gentle Giant to discuss counterpoint, polyrhythms, and... Bon Jovi.
Untangling the events that led to the "Stairway To Heaven" lawsuit.