KT Tunstall's "Suddenly I See" was inspired by Robert Mapplethorpe's photograph of Patti Smith on the cover of her album Horses.
Harry Chapin's wife Sandy wrote the lyrics to "Cat's In The Cradle," which were actually about her first husband.
The first female rapper to perform on a #1 hit? Surprisingly, it's Lil' Kim with the 2001 remake of "Lady Marmalade" for the movie Moulin Rouge. She was was joined on the track by Christina Aguilera, Missy Elliott, Pink and Mya.
Ed Sheeran thought he wrote the x track "Photograph" on 6th Street in Denver, so he got a tattoo saying 6 ST. But when he returned it turned out the street was actually 6th Avenue.
"Human" by The Killers was the most streamed song on Spotify in 2008, the year that the music streaming service was launched.
John Legend wrote "All Of Me" about his fiancée Chrissy Teigen. He sang it to her at their wedding ceremony in Como, Italy.
When he was playing Ozzfest with Black Label Society, a kid told Zakk he was the best Ozzy guitarist - Zakk had to correct him.
They sang about pink torpedoes and rocking you tonight tonight, but some real lyrics are just as ridiculous. See if you can tell which lyrics are real and which are Spinal Tap in this lyrics quiz.
How well do you know your protest songs (including the one that went to #1)?
The lead singer/lyricist of The Beach Boys talks about coming up with the words for "Good Vibrations," "Fun, Fun, Fun," "Kokomo" and other classic songs.
The Evanescence frontwoman on the songs that have shifted meaning and her foray into kids' music.
How the American gangsta rappers made history by getting banned in the UK.