Ariana Grande's hit "Problem" started off as a track written by One Direction songwriter Savan Kotecha. He gave it the working title of "The Whisper Song," after a 2005 Ying Yang Twins hit.
Elton John's "Rocket Man" is based on a Ray Bradbury story called The Rocket Man published in 1951.
The thunderclap sound heard in the Bee Gees song "Tragedy" was made by Barry Gibb with his mouth.
Elvis Presley recorded "Always On My Mind" in 1972, but Willie Nelson's version 10 years later was the hit and won the Song of the Year Grammy.
The title "25 Or 6 To 4" by Chicago refers to the time it was written: either 25 minutes to 4 (3:35) or 26 (3:34).
Janet Jackson wrote the lyric to "Nasty" in response to random guys calling her "baby."
The Bush frontman on where he finds inspiration for lyrics, if his "machine head" is a guitar tuner, and the stories behind songs from the album The Kingdom.
Petula talks about her hits "Downtown" and "Don't Sleep In The Subway," and explains her Michael Jackson connection.
When Dave recorded the first version of the song with his group the Blasters, producer Nick Lowe gave him some life-changing advice.
Pool balls, magpies and thorns without roses - how well do you know your Tom Waits lyrics?
A selection of songs made to be terrible - some clearly achieved that goal.
Dwarfs on stage with an oversize Stonehenge set? Dabbling in Satanism? Find out which Spinal Tap-moments were true for Black Sabbath.
