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.
Michael Jackson's "Human Nature" was written by the keyboard player from Toto, who was working on the Thriller album.
"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.
Wang Chung's '80s classic "Dance Hall Days" is about how things can start simple but end up complex. First you "take your baby by the hand," but by the end she has an amethyst in her mouth.
"Kashmir" is the only Led Zeppelin song to use outside musicians, as it needed strings and horns.
"Your Time Is Gonna Come" became the first Led Zeppelin song to be covered when Sandie Shaw recorded it in 1969.
A selection of songs made to be terrible - some clearly achieved that goal.
When singers started spoofing their own songs on Sesame Street, the results were both educational and hilarious - here are the best of them.
Collaborating with T Bone Burnett, Leslie Phillips changed her name and left her Christian label behind - Robert Plant, who recorded one of her songs on Raising Sand, is a fan.
The longtime Eagle talks about soaring back to his solo career, and what he learned about songwriting in the group.
Elvis, Little Richard and Cheryl Cole have all sung about Teddy Bears, but there is also a terrifying Teddy song from 1932 and a touching trucker Teddy tune from 1976.
A top session musician, Carol played on hundreds of hits by The Beach Boys, The Monkees, Frank Sinatra and many others.
