Miley Cyrus didn't write "Wrecking Ball" but could very much relate to it. She was having problems in her relationship with Liam Hemsworth, so the theme of giving your love only to have it wrecked really resonated with her.
"How To Save A Life" by The Fray was inspired by a teenager lead singer Isaac Slade mentored at a camp for troubled youth in Colorado.
"All I Want For Christmas Is You" by Mariah Carey was the first ringtone certified Gold.
After Gwen Stefani and Gavin Rossdale coupled up in 1996, Rossdale's Bush bandmates referred to their hit song "Everything Zen" as "Everything Gwen."
"Man On The Moon" by R.E.M. is about the comedian Andy Kaufman, who often seemed like he was from another planet.
Ellie Goulding's hit single "Burn" was originally demoed by Leona Lewis for her 2011 Glassheart album. She scrapped the tune when the project was retooled to include more ballads.
JJ talks about The Stranglers' signature sound - keyboard and bass - which isn't your typical strain of punk rock.
Charlie discusses the songs that made him a Southern Rock icon, and settles the Devil vs. Johnny argument once and for all.
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.
The hitmaking songwriter/producer Sam Hollander with stories about songs for Weezer, Panic! At The Disco, Train, Pentatonix, and Fitz And The Tantrums.
Taylor talks about "The Machine" - the hits, the videos and Clive Davis.
An interview with Dr. John Covach, music professor at the University of Rochester whose free online courses have become wildly popular.