Katy Perry's "Dark Horse" was co-written by Sarah Hudson, who is a singer-songwriter and 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.
Zach Bryan and Kacey Musgraves had both gone through divorces when they wrote and recorded the wrenching duet "I Remember Everything." It was the first #1 Hot 100 hit for each of them.
After 47 visits to the Hot 100, Justin Bieber topped the tally for the first time on September 17, 2015 with "What Do You Mean?"
You wouldn't know it from the upbeat melody, but "Walkin' On The Sun" by Smash Mouth is about the 1992 Los Angeles Riots.
The Red Hot Chili Peppers' biggest hit is "Under The Bridge," a ballad not typical of their sound. Frontman Anthony Kiedis wrote the lyric after an acute bout of loneliness.
"Rio" by Duran Duran is a metaphor for America, where the band was trying to break through.
Test your metal - Priest, Maiden, and Beavis and Butt-head show up in this one.
Since emerging from MySpace with her hit "Bubbly," Colbie has become a top songwriter, even crafting a hit with Taylor Swift.
Did Marvin try out with the Detroit Lions? Did he fake crazy to get out of military service? And what about the cross-dressing?
Phone booths are nearly extinct, but they provided storylines for some of the most profound songs of the pre-cell phone era.
Michelob commercials generated hits for Eric Clapton, Genesis and Steve Winwood in the '80s, even as some of these rockers were fighting alcoholism.
Kooper produced Lynyrd Skynyrd, played with Dylan and the Stones, and formed BS&T.