Sia planned to quit her solo career after her 2014 album 1000 Forms of Fear, but the "Chandelier" video proved so popular it drew her back in.
The names Louise, Jack, Marie and Milo all show up in the song "Footloose." Marie was the mother of Dean Pitchford, who co-wrote it.
Ellie Goulding's hit song "Lights" is about her fear of the dark, which forces the singer to sleep with the lights on.
"Stop Your Sobbing" was first recorded by The Kinks in 1964. It became the Pretenders first single 15 years later, leading to a relationship between Ray Davies and Chrissie Hynde.
Ronnie Dunn wrote "Boot Scootin' Boogie" before he teamed up with Kix Brooks to form Brooks & Dunn. It was originally recorded by the country group Asleep At The Wheel, but Brooks & Dunn did it themselves when it got its own line dance.
The Mary J. Blige song "No More Drama" samples the theme to the appropriately dramatic soap opera The Young And The Restless.
Zac tells the story of Hanson's massive hit "MMMbop," and talks about how brotherly bonds effect their music.
Justin wrote the classic "Nights In White Satin," but his fondest musical memories are from a different decade.
Kooper produced Lynyrd Skynyrd, played with Dylan and the Stones, and formed BS&T.
Greg talks about writing songs of "universal truth" for King Crimson and ELP, and tells us about his most memorable stage moment (it involves fireworks).
Rockers, rappers and pop stars have been known to quote the Bible in their songs. See if you match the artist to the biblical lyric.
Rick has a surprising dark side, a strong feminine side and, in a certain TV show, a naked backside. But he still hasn't found Jessie's Girl.