Paul McCartney wrote "Hey Jude" to comfort John Lennon's 5-year-old son Julian, whose parents were getting a divorce.
Donna Summer's "Bad Girls" is about prostitutes, but it was still used in the movie Rugrats In Paris.
Train wrote the 2011 song "Brand New Book" for the TV show The Biggest Loser - part of the song was used in the opening credits.
Bob Dylan's original version of "Mr. Tambourine Man," released on his album Bringing It All Back Home, has no tambourine, just guitars and harmonica.
KT Tunstall's "Suddenly I See" was inspired by Robert Mapplethorpe's photograph of Patti Smith on the cover of her album Horses.
What happens when Kurt Cobain, Iron Maiden and Johnny Lydon are told to lip-synch? Some hilarious "performances."
The Third Day frontman talks about some of the classic songs he wrote with the band, and what changed for his solo country album.
Tyler talks about his true love: songwriting. How he identifies the beauty in a melody and turns sorrow into art.
On "Life Is A Highway," his burgeoning solo career, and the Rascal Flatts song he most connects with.
Not everyone can be a superhero, but that hasn't stopped generations of musicians from trying to be Superman.
