Lil Wayne does an unlikely rap in a remix of the Joe Jonas song "Just In Love." The pair met at the 2008 MTV Video Music Awards.
Ellie Goulding's hit single "Burn" was originally demoed by Leona Lewis for her 2011 Glassheart album. She scrapped the tune when the project was retooled to include more ballads.
Madonna's hit "Like A Prayer" debuted in a Pepsi commercial, but Pepsi pulled the ad the next day when the controversial video appeared. Madonna got to keep her $5 million endorsement money.
Mariah Carey and P. Diddy show up in the Mary J. Blige "No More Drama" video, since they were going through Shakespeare-level drama.
"Sloop John B" is a traditional West Indian folk song, and it was a huge hit for The Beach Boys in 1966. They tweaked the lyric, "This is the worst trip since I've been born" to "...I've ever been on" as a wink to acid culture.
The actor Dan Aykroyd sang on "We Are The World." LaToya Jackson did too, so we know they weren't all that picky.
An interview with Dr. John Covach, music professor at the University of Rochester whose free online courses have become wildly popular.
For songwriters, Johnny represents the American man. He has been angry, cool, magic, a rebel and, of course, marching home.
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?"
A look at the good (Diana Ross, Eminem), the bad (Madonna, Bob Dylan) and the peculiar (David Bowie, Michael Jackson) film debuts of superstar singers.
Prince is shrouded in mystery, making him an excellent candidate for Fact or Fiction. Is he really a Scientologist? Does he own an exotic animal?
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.