At the end of the Doors song "Touch Me," Jim Morrison chants, "Stronger than dirt!" The line is from an Ajax commercial where a white knight rides around destroying dirt.
"Rockin' In The Free World" is a very pro-America title, but the song takes on politicians who are indifferent to the poor and disenfranchised.
Ellie Goulding's hit song "Lights" is about her fear of the dark, which forces the singer to sleep with the lights on.
Thanks to the line "shake it like a Polaroid picture," Outkast's "Hey Ya!" made Polaroid cameras cool again. Many other artists have since mentioned Polaroid in their lyrics, including Eminem, Imagine Dragons, Keith Urban, Gorillaz and Tim McGraw.
There's a lot of Americana in "Uncle John's Band" by the Grateful Dead, including references to "Buckdancer's Choice" (an Appalachian folk song) and "Fire And Ice," a Robert Frost poem.
Eric Clapton's only Hot 100 #1, either solo or with one of his many bands, was his cover of Bob Marley's "I Shot The Sheriff."
These overtly religious songs crossed over to the pop charts, despite resistance from fans, and in many cases, churches.
Here is the church, here is the steeple - see if you can identify these lyrics that reference church.
Rockers, rappers and pop stars have been known to quote the Bible in their songs. See if you match the artist to the biblical lyric.
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.
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.
A top country songwriter, Barry talks about writing hits for Little Big Town, Tim McGraw and Jason Aldean.