"Crazy Train" by Ozzy Osbourne is about the Cold War concept of Mutually Assured Destruction (M.A.D.) should any nuclear missile be fired.
"Veronica" was inspired by Elvis Costello's grandmother, who suffered from Alzheimer's disease.
"After Midnight" was written by the Oklahoma guitarist J.J. Cale, who was dirt poor until Eric Clapton recorded his song and turned it into a hit.
One of the most successful cover songs is Fugees' "Killing Me Softly," a 1996 reworking of Roberta Flack's 1973 hit. Originally, Fugees wanted to change the title to "Killing Him Softly" and make it about the dangers of drug abuse.
"We Are Never Ever Getting Back Together" by Taylor Swift earned an entry in the 2014 edition of the Guinness Book of Records for the fastest-selling digital single. It reached the #1 spot on iTunes just 50 minutes after its release.
The eerie percussion and guitar for Portsihead's "Sour Times" was sampled from Lalo Schifrin's "Danube Incident," music composed by the Argentine composer for an episode of Mission Impossible.
Test your metal - Priest, Maiden, and Beavis and Butt-head show up in this one.
Do you know who wrote Patti Smith's biggest hit? How about the Grease theme song? See if you can match the song to the writer.
Rob Halford dives into some of his Judas Priest lyrics, talking about his most personal songs and the message behind "You've Got Another Thing Comin'."
The Def Leppard frontman talks about their "lamentable" hit he never thought of as a single, and why he's juiced by his Mott The Hoople cover band.
Rosanne talks about the journey that inspired her songs on her album The River & the Thread, including a stop at the Tallahatchie Bridge.
The (Meat)puppetmaster takes us through songs like "Lake Of Fire" and "Backwater," and talks about performing with Kurt Cobain on MTV Unplugged.