Before she was famous, Lady Gaga was a staff songwriter, and wrote the song "Quicksand," which Britney Spears recorded in 2008.
Salt's "mighty good man" in the Salt-N-Pepa "Whatta Man" video is played by Tupac Shakur.
Jonah Hill directed the video for Sara Bareilles' song "Gonna Get Over You." It's a mash-up of Grease and West Side Story.
"Call Me Maybe" by Carly Rae Jepsen was the song of the summer in 2012 and a major meme. It got some help from her fellow Canadian Justin Bieber, who tweeted that it was "possibly the catchiest song I've ever heard."
Kenny Loggins co-wrote the Doobie Brothers hit "What a Fool Believes," which is about a guy who just can't accept that an affair from long ago was meaningless to her.
"Jessie's Girl" tells the true story of a girl Rick Springfield was crushing on, but her boyfriend's name was really Gary and he was more of an acquaintance than a friend.
Songs that seem to glorify violence against women are often misinterpreted - but not always.
Smith breaks down some of his worship tracks as well as his mainstream hits, including "I Will Be Here For You" and "A Place In This World."
It wasn't her biggest hit as a songwriter (that would be "Bette Davis Eyes"), but "Put a Little Love in Your Heart" had a family connection for Jackie.
The renown Texas songwriter has been at it for 40 years, with tales to tell about The Flatlanders and The Clash - that's Joe's Tex-Mex on "Should I Stay or Should I Go?"
Are classic songs like "Over The Rainbow" and "Take Me Out to the Ballgame" in the public domain?
Nick made some of the biggest videos on MTV, including "The Final Countdown," "Heaven" and "Don't Know What You Got (Till It's Gone)."