Jonah Hill directed the video for Sara Bareilles' song "Gonna Get Over You." It's a mash-up of Grease and West Side Story.
The Foo Fighters song "Everlong" isn't about Kurt Cobain, but Dave Grohl's girlfriend at the time, Veruca Salt frontwoman Louise Post.
The Ozzy Osbourne song "Mr. Crowley" is about Aleister Crowley, a British practitioner of dark magic in the early 1900s.
Alicia Keys, Elton John, Fergie, and Rihanna all sang on "All of the Lights" by Kanye West.
Ronnie Van Zant wrote the Lynyrd Skynyrd classic "Gimme Three Steps" after making the mistake of dancing with a girl whose boyfriend was in the bar and probably had a gun. He asked for a 3-step head start.
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.
Deep Purple's guitarist since 1994, Steve talks about writing songs with the band and how he puts his own spin on "Smoke On The Water."
Tyler talks about his true love: songwriting. How he identifies the beauty in a melody and turns sorrow into art.
These overtly religious songs crossed over to the pop charts, despite resistance from fans, and in many cases, churches.
Was Janet secretly married at 18? Did she gain 60 pounds for a movie role that went to Mariah Carey? See what you know about Ms. Jackson.
Bradley Cooper, Michael J. Fox, Rami Malek, Reese Witherspoon, Gwyneth Paltrow and George Clooney: Which actors really sang in their movies?
When a waitress wouldn't take him home, Jack wrote what would become one of the Eagles most enduring hits.