Lou Reed's 11-minute "Street Hassle" features a spoken part by Bruce Springsteen.
Iggy Pop wrote "Lust For Life" with David Bowie, who came up with the music on a ukulele.
Avril Lavigne's 2011 song "Darlin" was written much earlier; she says it's the second song she ever wrote, composed when she was an unsigned 15-year-old living in Napanee, Ontario. The song reflects those years when she was "trying to figure it all out."
2001 was when collaborations between rappers and singers became commonplace, leading to a new Grammy category: Best Rap/Sung Collaboration. The first winner was "Let Me Blow Ya Mind" by Eve and Gwen Stefani. This was before Stefani put out her first solo album.
Ed Sheeran's first single was "The A Team," a song about a homeless drug-addict who turns to prostitution. He wrote it based on a woman he met while volunteering at a shelter; Ed was shocked when it became a hit and launched his career.
"We Belong Together" finds Mariah Carey listening to the radio and hearing songs that remind her of heartbreak. Two real songs get specific mentions: "If You Think You're Lonely Now" by Bobby Womack and "Two Occasions" by The Deele (Babyface's group).
Roger reveals the songwriting formula Clive Davis told him, and if "Eight Miles High" is really about drugs.
Donny Osmond talks about his biggest hits, his Vegas show, and the fan who taught him to take "Puppy Love" seriously.
Did Eric Clapton really steal George's wife? What's the George Harrison-Monty Python connection? Set the record straight with our Fact or Fiction quiz.
Graham Nash tells the stories behind some of his famous songs and photos, and is asked about "yacht rock" for the first time.
A top session musician, Carol played on hundreds of hits by The Beach Boys, The Monkees, Frank Sinatra and many others.
Waters tells the "Gypsy Woman" story, shares some of her songwriting insights, and explains how Dennis Rodman ended up on one of her songs.