Recording "Don't Let The Sun Go Down On Me," Elton John was frustrated and sang the line "don't discard me" with an exaggerated American accent, which is why is sounds strange.
The lyrics to "Heartbreak Hotel" were written by a steel guitar player who was once a dishwasher repairman. He was inspired by a newspaper story about a man who killed himself and left behind a note saying only, "I walk a lonely street."
"How To Save A Life" by The Fray was inspired by a teenager lead singer Isaac Slade mentored at a camp for troubled youth in Colorado.
Rihanna's 2012 hit "Diamonds" was written by Sia Furler, who two years later had a huge hit on her own with "Chandelier." Sia also wrote the David Guetta hit "Titanium."
George Michael was 17 and on a bus to his job at the cinema when he came up with the idea for "Careless Whisper" and the lyrics, "Something in your eyes calls to mind a silver screen."
"Instant Karma" is one of John Lennon's most hopeful songs, written and recorded in one day at a time when he felt people were pulling together in a positive direction.
Cain talks about the divine inspirations for "Don't Stop Believin'" and "Faithfully."
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.
Gramm co-wrote this gorgeous ballad and delivered an inspired vocal, but the song was the beginning of the end of his time with Foreigner.
Just like Darrin was replaced on Bewitched, groups have swapped out original members, hoping we wouldn't notice.
Not everyone can be a superhero, but that hasn't stopped generations of musicians from trying to be Superman.
Songs where something goes horribly wrong (literally or metaphorically), and help is needed right away.