Members of the San Francisco 49ers, including Dwight Clark, Joe Montana and Ronnie Lott, sang backup on "Hip to Be Square" by Huey Lewis and the News.
"Sing" was inspired by a girl that Ed Sheeran met in Las Vegas in the summer of 2013, when "one thing led to another and now she's kissing my mouth."
Jay-Z was going to ask Mary J. Blige to duet on "Empire State of Mind," but he decided on Alicia Keys when he heard the piano stabs on the track.
Alicia Keys, Elton John, Fergie, and Rihanna all sang on "All of the Lights" by Kanye West.
The original "Enter Sandman" lyric was about crib death, with the "sandman" killing a baby.
"Wanna Be Startin' Somethin'" was Michael Jaskson's attack on the tabloid press: "They eat off of you, you're a vegetable."
Into the vaults for this talk with Bolton from the '80s when he was a focused on writing songs for other artists.
Oliver Leiber talks about writing and producing hits for Paula Abdul, and explains his complicated relationship with his father, the songwriter Jerry Leiber.
The former Metallica bassist talks about his first time writing a song with James Hetfield, and how a hand-me-down iPad has changed his songwriting.
Rock Stars - especially those in the metal realm - are often enlisted for horror movies. See if you know can match the rocker to the role.
Songs about drugs, revolution and greed that have been used in commercials for sneakers, jeans, fast food, cruises and cars.
Richie talks about producing the first two Kiss albums, recording "Brother Louie," and the newfound appreciation of his rock band, Dust.