The Kate Bush song "Why Should I Love You?" is a collaboration with Prince. He completely re-worked her demo, so Bush spent a lot of time piecing it back together to keep her imprint.
The chorus in "September" by Earth, Wind & Fire is "Bada-Ya, dancing in September." Group leader Maurice White left it "Bada-Ya" instead of a real word because he never let a lyric get in the way of a groove.
Dido helped shut down a Neo-Nazi Web site after learning it was using "White Flag" to promote its hateful messages. Owners of the site had misinterpreted the track as racist and thought they represented their white supremacy views.
"Everybody Wants To Rule The World" was a line from a 1980 Clash song called "Charlie Don't Surf." Tears For Fears used it as the title of their 1985 hit.
Katy Perry co-wrote Iggy Azalea's hit single "Black Widow." Perry was originally going to sing on the track, but she couldn't fit it into her schedule, so Rita Ora provided the sung vocals instead.
Rapper Memphis Bleek's 2005 album track "The One" is notable for featuring a then-unknown Rihanna on the hook. It was the Barbadian singer's first-ever major-label appearance.
Billie Jean, Delilah, Sara, Laura and Sharona - do you know who the girls in the songs really are?
"25 or 6 to 4" to "Semi-Charmed Life" - see if you can spot the songs that are really about drugs.
Katy Perry mentions McDonald's, Beyoncé calls out Red Lobster, and Supertramp shouts out Taco Bell - we found the 10 restaurants most often mentioned in songs.
Deep Purple's guitarist since 1994, Steve talks about writing songs with the band and how he puts his own spin on "Smoke On The Water."
The Red Hot Chili Peppers have some rather unusual song titles - see if you can spot the real ones.
For songwriters, Johnny represents the American man. He has been angry, cool, magic, a rebel and, of course, marching home.