Katy Perry co-wrote Iggy Azalea's hit single "Black Widow." Perry was originally going to sing on the track, but she couldn't fit it into her schedule, so Rita Ora provided the sung vocals instead.
Ed Sheeran's first single was "The A Team," a song about a drug-addicted prostitute.
Many people believe "Hotel California" is about a mental institution called the Camarillo, but the Eagles say it's about materialism and excess.
"True" by Spandau Ballet is about chief songwriter Gary Kemp's unrequited love for Altered Images singer and Gregory's Girl star Clare Grogan.
The Destiny's Child "Independent Women Part I" video was directed by the same guy who did the Hunger Games movies.
The "Don't Stop Believin'" resurgence started when the Journey song was used in a roller skating scene of the 2003 movie Monster.
Starting in Virginia City, Nevada and rippling out to the Haight-Ashbury, LSD reshaped popular music.
Glen Ballard talks about co-writing and producing Alanis Morissette's Jagged Little Pill album, and his work with Dave Matthews, Aerosmith and Annie Lennox.
Jon Anderson breaks down the Yes classic "Seen All Good People" and talks about his 1000 Hands album, which features Chick Corea, Rick Derringer, Ian Anderson, and many other luminaries.
The Christian rapper talks about where his trip to Haiti and his history of addiction fit into his songs.
Howard explains his positive songwriting method and how uplifting songs can carry a deeper message.
Roger reveals the songwriting formula Clive Davis told him, and if "Eight Miles High" is really about drugs.