Eric Clapton wrote "Layla" about his love for Pattie Harrison, who was married to George Harrison at the time. He eventually married Pattie, and managed to stay friends with George.
Dan Tyminski, the singer on Avicii's "Hey Brother" is the same guy who sang lead vocal on "A Man Of Constant Sorrow" in the movie O’ Brother, Where Art Thou.
Rihanna was Pitbull's first choice to sing on "Timber," but she wasn't available at the time so he enlisted his RCA labelmate Kesha instead.
A one-ton bell was custom made for AC/DC's "Hell's Bells." The recording was slowed to half speed to make it sound like a more ominous two-ton bell.
Phil Collins' "Take Me Home" is about a patient in a mental institution and was inspired by the novel One Flew Over the Cuckoo's Nest.
"You Get What You Give" by The New Radicals was the first hit song to use the word "frenemies" in the lyric.
The Red Hot Chili Peppers have some rather unusual song titles - see if you can spot the real ones.
With a few clues (Works at a diner, dreams of running away), can you name the character in the song?
When he was asked to write a song for the Singles soundtrack, Mark thought the Seattle grunge scene was already overblown, so that's what he wrote about.
How well do you know your David Bowie lyrics? Take this quiz to find out.
A top session musician, Carol played on hundreds of hits by The Beach Boys, The Monkees, Frank Sinatra and many others.
Paul Stanley on his soul music project, the Kiss songs with the biggest soul influence, and the non-make-up era of the band.