In Belgium, where the Battle of Waterloo took place, "Waterloo" by ABBA was a huge hit, #1 for five weeks.
Post Malone came up with "White Iverson" after getting braids in his hair and thinking they looked like basketball legend Allen Iverson's signature cornrows.
Eminem sampled a song by Labi Siffre on "My Name Is." Siffre, a gay activist, made Em take out some gay humor in the lyric before allowing it.
Taylor Swift's "Shake It Off" was inspired by how she'd learned to deal with all the false rumors that circulated about her. She realized she could either let it get to her or "just shake it off."
Shaggy wrote his swaggering hit "Boombastic" after learning what "shag" means in the UK.
Billy Joel is surprised that "Piano Man" is so successful. He called it "an old, long song about a guy at a depressing piano bar."
The renown Texas songwriter has been at it for 40 years, with tales to tell about The Flatlanders and The Clash - that's Joe's Tex-Mex on "Should I Stay or Should I Go?"
The Christian rapper talks about where his trip to Haiti and his history of addiction fit into his songs.
For songwriters, Johnny represents the American man. He has been angry, cool, magic, a rebel and, of course, marching home.
Martyn talks about producing Tina Turner, some Heaven 17 hits, and his work with the British Electric Foundation.
One of the first successful female singer-songwriters, Janis had her first hit in 1967 at age 15.
Since his debut single "I'm On Fire" in 1975, Dwight has been providing Spinal-Tap moments and misadventure.