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.
"Veronica" was inspired by Elvis Costello's grandmother, who suffered from Alzheimer's disease.
Drake's "One Dance" was the first ever song to rack up one billion streams on Spotify.
Damon Albarn found inspiration for Blur's "Girls And Boys" whilst on holiday in Magaluf on the Spanish island of Majorca.
The electronic instruments in "Atomic Dog" represent the coming computer age, which is balanced by the instinctual dog, who barks and pants throughout the song.
"Tainted Love" started as a 1964 soul song by Gloria Jones, became a huge hit when Soft Cell covered it in 1981, and was the basis for Rihanna's 2006 #1 "S.O.S. (Rescue Me)."
When he was asked to write a song for the Singles soundtrack, Mark thought the Seattle grunge scene was already overblown, so that's what he wrote about.
Harry Wayne Casey tells the stories behind KC and The Sunshine Band hits like "Get Down Tonight," "That's The Way (I Like It)," and "Give It Up."
Rob Halford, Richie Faulkner and Glenn Tipton talk twin guitar harmonies and explain how they create songs in Judas Priest.
Waters tells the "Gypsy Woman" story, shares some of her songwriting insights, and explains how Dennis Rodman ended up on one of her songs.
The lead singer on "Da Doo Ron Ron" and "Then He Kissed Me," La La explains how and why Phil Spector replaced The Crystals with Darlene Love on "He's A Rebel."
Iron Maiden, Adele, Toto, Eminem and Earth, Wind & Fire are just some of the artists with songs directly inspired by movies - and not always good ones.