The actor Dan Aykroyd sang on "We Are The World." LaToya Jackson did too, so we know they weren't all that picky.
Chaka Khan's hit "I Feel For You" was written and originally recorded by Prince four years before she covered it.
Lucinda Williams' track "Compassion" is based on a poem by her father, lauded Arkansas poet Miller Williams.
"I Just Called To Say I Love You" is Stevie Wonder's best-selling single worldwide. It topped the Hot 100, AC, R&B and UK charts all in the same week.
The original "Venus" was a #1 hit for the Dutch band Shocking Blue. Listen to the first line and you'll hear a muffed word: "goddess" was sung as "goddness."
Billy Joel's "Uptown Girl" is about Christie Brinkley, who he married, but it started as a song about Elle McPherson, who he also went out with.
Scaramouch, a hoople and a superhero soundtrack - see if you can spot the real Queen stories.
If the name Citizen Dick means anything to you, there's a chance you'll get some of these right.
The Doobies guitarist and lead singer, Tom wrote the classics "Listen To The Music," "Long Train Runnin'" and "China Grove."
Doors expert Jim Cherry, author of The Doors Examined, talks about some of their defining songs and exposes some Jim Morrison myths.
Scott was Stevie Wonder's bass player before becoming a top session player. Hits he played on include "I Will Survive," "Being With You" and "Sara Smile."
