"Sing" was inspired by a girl that Ed Sheeran met in Las Vegas in the summer of 2013, when "one thing led to another and now she's kissing my mouth."
Johnny Cash's wife, June Carter, wrote "Ring Of Fire" about their relationship.
A gospel choir appears in Sam Smith's "Stay With Me" video, but the vocals on the song are all Smith - about 20 tracks of his voice were used to make him sound like a chorus.
Part of the "Cruel to Be Kind" video was shot during Nick Lowe and Carlene Carter's wedding.
Don McLean's "American Pie" starts in mono and gradually goes to stereo. It isn't full stereo until the end of the song, which is over 8 minutes long.
The most famous pop song featuring a bassoon: "The Tears of a Clown" by Smokey Robinson & the Miracles.
Dean's saga began with "Ariel," a song about falling in love with a Jewish girl from New Jersey.
The flautist frontman talks about touring with Led Zeppelin, his contribution to "Hotel California", and how he may have done the first MTV Unplugged.
Roger tells the stories behind some of his biggest hits, including "Give a Little Bit," "Take the Long Way Home" and "The Logical Song."
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.
Lyrics don't always follow the rules of grammar. Can you spot the ones that don't?
Zac tells the story of Hanson's massive hit "MMMbop," and talks about how brotherly bonds effect their music.
