Paul McCartney wrote "Hey Jude" to comfort John Lennon's 5-year-old son Julian, whose parents were getting a divorce.
Village People lead singer Victor Willis, who co-wrote "Y.M.C.A.," insists it isn't a gay song - it's about hanging out with your buddies.
"Stand By Me" hit #4 in the US when it was released in 1961, then went to #9 in 1986 when it was used in the movie of the same name.
When Ed Sheeran's "Thinking Out Loud" climbed to the top of the UK singles chart in its 19th week, the song broke the record for the slowest continual ascent to #1.
Kelly Rowland was the first Destiny's Child member to have a hit away from the group: her Nelly duet "Dilemma."
Nirvana, Billy Joel and Bruce Springsteen are among those who wrote songs with cities that show up in this quiz.
Starting in Virginia City, Nevada and rippling out to the Haight-Ashbury, LSD reshaped popular music.
Despite appearances on Carson, Leno and a Pennebaker film, Williams remains a hidden treasure.
It wasn't her biggest hit as a songwriter (that would be "Bette Davis Eyes"), but "Put a Little Love in Your Heart" had a family connection for Jackie.
The Stax legend on how he cooked up "Green Onions," the first time he and Otis Redding saw hippies, and if he'll ever play a digital organ.
