Katy Perry co-wrote Iggy Azalea's hit single "Black Widow." Perry was originally going to sing on the track, but she couldn't fit it into her schedule, so Rita Ora provided the sung vocals instead.
"Mr. Tambourine Man" is the only song Bob Dylan wrote that became a #1 hit on the Hot 100. The Byrds' cover topped the chart in 1965.
John Lennon got the title of the Beatles song "Happiness Is A Warm Gun" from an article in a magazine published by the National Rifle Association.
Sir Mix-A-Lot is credited as a writer on The Pussycat Dolls' biggest hit, "Don't Cha," because it interpolates his 1988 song "Swass," where he goes, "Don't you wish your boyfriend was swass like me?"
Amy Winehouse really did refuse "Rehab." She said she drank because she was lovesick, and "you can't go into rehab for that."
Jay-Z did the rap on Beyoncé's "Crazy In Love" at the last minute. They had just started dating; she asked him to feature on the track the night before she had to turn in her album.
The stories behind "Whole Of The Moon" and "Red Army Blues," and why rock music has "outlived its era of innovation."
They sang about pink torpedoes and rocking you tonight tonight, but some real lyrics are just as ridiculous. See if you can tell which lyrics are real and which are Spinal Tap in this lyrics quiz.
"How much does it cost? I'll buy it?" Another songwriter told Jonathan to change these lyrics. Good thing he ignored this advice.
Inspired by his dear friend, "Seasons in the Sun" paid for Terry's boat, which led him away from music and into a battle with Canadian paper mills.
Songs that seem to glorify violence against women are often misinterpreted - but not always.
Fishbone has always enjoyed much more acclaim than popularity - Angelo might know why.