An unknown Ke$ha sang on Flo-Rida's #1 hit "Right Round," but refused to appear in the video because she wanted to make a name for herself.
"Rhiannon" is a Welch goddess. Stevie Nicks wrote the song, and it was a huge influence on her image, inspiring her flowing shawls and black outfits she began wearing on stage.
"Crazy Kids'" lyrics were inspired by a birthday party of Ke$ha's, which she described as, "one crazy night."
Celine Dion's 1998 festive tune "The Magic of Christmas Day (God Bless Us Everyone)" came from an unlikely source. It was penned by Dee Snider of the heavy metal band Twisted Sister.
Katy Perry's breakout hit "I Kissed A Girl" was surprising to those familiar with her past: her parents were pastors and she started off singing Christian music.
Al Green's "Take Me to the River" describes a baptism. Two years later, he became a reverend.
Here's what happens when an opening act is really out of place with the headliner, like when Beastie Boys opened for Madonna.
The lead singer/lyricist for Anberlin breaks down "Impossible" and covers some tracks from their 2012 album Vital.
"How much does it cost? I'll buy it?" Another songwriter told Jonathan to change these lyrics. Good thing he ignored this advice.
The Doobies guitarist and lead singer, Tom wrote the classics "Listen To The Music," "Long Train Runnin'" and "China Grove."
Guitarist Tony Iommi on the "Iron Man" riff, the definitive Black Sabbath song, and how Ozzy and Dio compared as songwriters.
In the summer of 1990, you could get arrested for selling a 2 Live Crew album or performing their songs in Southern Florida. And that's exactly what happened.
