Thanks to Tom VK for supplying this photo. He writes:
Paul McCartney wrote "Ebony and Ivory," his duet with Stevie Wonder, after a tiff with his wife Linda. "It was like, 'Why can't we get it together- our piano can,'" he explained.

Sia Furler originally sent "Pretty Hurts" to Katy Perry, but she didn't see the email, so Beyonce ended up recording it instead.

An Allen Ginsberg line from his poem Howl inspired "Machinehead" by Bush: "Machine says I saw the best minds of my generation."

Gina in Bon Jovi's "Livin' On A Prayer" is based on a singer named Maria Vidal, who was working as a singing waitress using the name Gina Velvet.

Salt's "mighty good man" in the Salt-N-Pepa "Whatta Man" video is played by Tupac Shakur.

"Every Breath You Take" by The Police feels like a love song, but a careful listen reveals it's about a stalker. Sting called it "a nasty little song, really rather evil. It's about jealousy and surveillance and ownership."
Roger reveals the songwriting formula Clive Davis told him, and if "Eight Miles High" is really about drugs.
On Glen's résumé: hit songwriter, Facebook dominator, and member of Styx.
Switchfoot's frontman and main songwriter on what inspires the songs and how he got the freedom to say exactly what he means.
Shaun breaks down the Seether songs, including the one about his brother, the one about Ozzy, and the one that may or may not be about his ex-girlfriend Amy Lee.
Shears does very little promotion, which has kept him secluded from the spotlight. What changed when Cyndi Lauper had a hit with his song? Not much, really.