Pink Floyd's "Talkin' Hawkin'" uses a sample of Stephen Hawking's synthesized voice taken from a speech he made for a 1994 British Telecom commercial.
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.
The Goo Goo Dolls got the title for their song "Iris" from a Country singer named Iris DeMent.
The 311 song "Amber" is likely about Nicole Scherzinger, who was dating the band's lead singer Nick Hexum.
"Truckin'" was written as the Grateful Dead were starting their long, strange trip, settling into a life of constant touring. They rode busses and holed up in modest hotels to stay grounded.
Bernie Taupin was 17 when he wrote the lyrics to Elton John's "Your Song." Looking back, he says it's "one of the most naïve and childish lyrics in the entire repertoire of music."
Phil was a songwriter, producer and voice behind many Philadelphia soul classics. When disco hit, he got an interesting project: The Village People.
How well do you know the lyrics of U2?
JJ talks about The Stranglers' signature sound - keyboard and bass - which isn't your typical strain of punk rock.
Scott was Stevie Wonder's bass player before becoming a top session player. Hits he played on include "I Will Survive," "Being With You" and "Sara Smile."
Katy Perry mentions McDonald's, Beyoncé calls out Red Lobster, and Supertramp shouts out Taco Bell - we found the 10 restaurants most often mentioned in songs.
Jon Fratelli talks about the band's third album, and the five-year break leading up to it.