"Light My Fire" was the first song Doors guitarist Robby Krieger wrote. Looking for a universal theme, he decided to write about one of the four elements (air, earth, water, fire).
Meghan Trainor and her producer Kevin Kadish wrote "All About That Bass" for another artist to record, but after Epic Records boss LA Reid heard Meghan play a demo of the song on a ukulele, he signed her to his label and told her she should sing it.
The title of Florence + the Machine's "How Big, How Blue, How Beautiful" was inspired by the Los Angeles skyline.
The game Lana Del Rey sings about in "Video Games" is World of Warcraft - her ex used to play it all the time.
One of the first hit songs used in a major marketing campaign was "Start Me Up" by The Rolling Stones. Microsoft paid $3 million to use it in commercials for Windows '95.
Katy Perry's "Dark Horse" was co-written by Sarah Hudson, who was a member of the pop group Ultraviolet Sound. Though Sarah isn't related to Katy (whose real name is Katy Hudson), she is the first cousin of another famous person with the same name, the actress Kate Hudson.
The man who created Yacht Rock with "Sailing" wrote one of his biggest hits while on acid.
Wes Edwards takes us behind the scenes of videos he shot for Jason Aldean, Dierks Bentley and Chase Bryant. The train was real - the airplane was not.
Gramm co-wrote this gorgeous ballad and delivered an inspired vocal, but the song was the beginning of the end of his time with Foreigner.
Did Marvin try out with the Detroit Lions? Did he fake crazy to get out of military service? And what about the cross-dressing?
Songs where something goes horribly wrong (literally or metaphorically), and help is needed right away.
Billie Jean, Delilah, Sara, Laura and Sharona - do you know who the girls in the songs really are?