The Devo song "Freedom Of Choice" is about mindless consumerism - how people like to make frivolous choices, but otherwise want to be told what to do.
A gospel choir appears in Sam Smith's "Stay With Me" video, but the vocals on the song are all Smith - about 20 tracks of his voice were used to make him sound like a chorus.
"Rhiannon" is a Welch goddess. Stevie Nicks wrote the song, and it was a huge influence on her image, inspiring her flowing shawls and black outfits she began wearing on stage.
Bob Dylan's most popular song is "Like A Rolling Stone," which tells the story of a wealthy woman whose money and friends fall away. Dylan offers these mockingly encouraging words: "When you ain't got nothing, you got nothing to lose."
"Won't Get Fooled Again" by The Who is about a revolution, but it doesn't have a happy ending, since in the end the new regime becomes just like the old one. Pete Townshend thought that whoever was in power was destined to become corrupt.
Neil Young wrote the CSN&Y song "Ohio" about the Kent State Shootings, when the National Guard opened fire on students at Kent State University in Ohio, killing four.
With $50 and a glue stick, Bruce Pavitt created Sub Pop, a fanzine-turned-label that gave the world Nirvana and grunge. He explains how motivated individuals can shift culture.
With his X-wife Exene, John fronts the band X and writes their songs.
Nick made some of the biggest videos on MTV, including "The Final Countdown," "Heaven" and "Don't Know What You Got (Till It's Gone)."
A top New York studio musician, Ralph played guitar on many '60s hits, including "Lightnin' Strikes," "A Lover's Concerto" and "I Am A Rock."
The lead singer/lyricist for Anberlin breaks down "Impossible" and covers some tracks from their 2012 album Vital.
David Gray explains the significance of the word "Babylon," and talks about how songs are a form of active imagination, with lyrics that reveal what's inside us.