Eminem spits a total of 1,560 words on "Rap God," earning him an entry in the 2015 Guinness Book of Records for "most words in a hit single."
"I Just Wanna Love U (Give It 2 Me)" by Jay-Z borrows four bars from Notorious B.I.G's "The World Is Filled." Jay-Z and Biggie Smalls attended Westinghouse Career and Technical Education High School in Brooklyn, New York, at the same time.
Sia Furler originally sent "Pretty Hurts" to Katy Perry, but she didn't see the email, so Beyonce ended up recording it instead.
The hit duet "Somewhere Out There" was written for an animated film about a family of immigrant mice who lose one of their young.
Paul McCartney based the "Eleanor Rigby" story on old ladies he met at his housing estate. He saw how sometimes when they died, nobody really noticed.
Kesha (known at the time as Ke$ha) was still pretty wild when she released her song "Crazy Kids" in 2012. It's about one of her birthday parties that got a little out of hand.
The original voice of Snap! this story is filled with angry drag queens, video impersonators and Chaka Khan.
Harry is Derek Smalls in Spinal Tap, Mark Shubb in The Folksmen, and Mr. Burns on The Simpsons.
Dean's saga began with "Ariel," a song about falling in love with a Jewish girl from New Jersey.
Julian tells the stories behind his hits "Valotte" and "Too Late for Goodbyes," and fills us in on his many non-musical pursuits. Also: what MTV meant to his career.
Keyboard great David Sancious talks about his work with Sting, Seal, Springsteen, Clapton and Aretha, and explains what quantum physics has to do with making music.
Here's what happens when an opening act is really out of place with the headliner, like when Beastie Boys opened for Madonna.