Katy Perry says her 2008 song "Ur So Gay" is about "guys who wear the guyliner, steal your jeans, and that whole almost hipster emo scene."
"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.
"I Won't Back Down" is a very personal song for Tom Petty. "I thought it wasn't that good because it was so naked," he said.
Dire Straits frontman Mark Knopfler got the idea for "Money For Nothing" after overhearing delivery men in a New York department store complain about their jobs while watching MTV.
Janet Jackson's "Rhythm Nation" was inspired by the tribes that came together at New York dance clubs.
"Instant Karma" is one of John Lennon's most hopeful songs, written and recorded in one day at a time when he felt people were pulling together in a positive direction.
Ozzy biting a dove? Alice Cooper causing mayhem with a chicken? Creed so bad they were sued? See if you can spot the real concert mishaps.
"25 or 6 to 4" to "Semi-Charmed Life" - see if you can spot the songs that are really about drugs.
Zac tells the story of Hanson's massive hit "MMMbop," and talks about how brotherly bonds effect their music.
Guitarist Tony Iommi on the "Iron Man" riff, the definitive Black Sabbath song, and how Ozzy and Dio compared as songwriters.
Outrageously gifted and just plain outrageous, Millie is an R&B and Rap innovator.
Chris tells the story of "Wicked Game," talks milkshakes and moonpies at Sun Records, and explains why women always get their way.