Jessie J had a lyric from her song "Who You Are" tattooed on her hip, but she spelled "lose" incorrectly so it reads: "Don't loose who you are in the blur of the stars."
"Paranoid" reflects a feeling Black Sabbath bass player Geezer Butler often felt after using drugs.
"Lean On" was originally sent by Major Lazer to both Rihanna and Nicki Minaj's camps as a slower reggae track. After both parties rejected the tune, Major Lazer recruited Danish singer MØ to supply vocals and recorded it themselves.
Madonna didn't write "Papa Don't Preach," which deals with abortion. What drew her to the song was the singer standing up to male authority.
A pre-famous Rupaul is in the video for "Love Shack" by The B-52s. He had a solo hit with "Supermodel" a few years later.
The lyrics for "Mary, Did You Know?" were written by Christian singer and comedian Mark Lowry, after his pastor asked him to write a Christmas musical for their church. Southern gospel musician Buddy Greene later added music to his words.
Collaborating with T Bone Burnett, Leslie Phillips changed her name and left her Christian label behind - Robert Plant, who recorded one of her songs on Raising Sand, is a fan.
Songs that seem to glorify violence against women are often misinterpreted - but not always.
Cain talks about the divine inspirations for "Don't Stop Believin'" and "Faithfully."
In her days with The Runaways, Joan Jett saw The Arrows perform "I Love Rock And Roll," which Alan Merrill co-wrote - that story and much more from this glam rock pioneer.
"Mr. Jones" took on new meaning when the song about a misguided view of fame made Adam famous.
Medley looks back on "Unchained Melody" and "You've Lost That Lovin' Feelin'" - his huge hits from the '60s that were later revived in movies.