The instrumental "YYZ" by Rush got its title from the transmitter code for Toronto's Lester B. Pearson International Airport, near where the band is from.
"Anaconda" was originally recorded by Missy Elliott in 2012, but the rapper decided to shelf the track so it was re-recorded by Minaj two years later.
There are no actual drums on "We Will Rock You," just lots of foot stomping.
Dexys Midnight Runners' "Come on Eileen" is based on a real girl called Eileen that the band's Kevin Rowland had a relationship with in his early teenage years.
"Forever" by Chris Brown was written for a Wrigley's Doublemint Gum commercial. The full song contains the gum's tagline: "Double your pleasure, double your fun."
The most famous song to prominently feature a French horn is "God Only Knows" by The Beach Boys.
Gary Lewis and the Playboys had seven Top 10 hits despite competition from The Beatles. Gary talks about the hits, his famous father, and getting drafted.
Taylor talks about "The Machine" - the hits, the videos and Clive Davis.
A top country songwriter, Barry talks about writing hits for Little Big Town, Tim McGraw and Jason Aldean.
He wrote "She Blinded Me With Science" so he could direct a video about a home for deranged scientists.
The "How Country Feels" singer talks Skynyrd and songwriting.
When she released her first album in 1988, Tanita became a UK singing sensation at age 19. She talks about her darkly sensual voice and quirky songwriting style.