Ellie Goulding's hit single "Burn" was originally demoed by Leona Lewis for her 2011 Glassheart album. She scrapped the tune when the project was retooled to include more ballads.
Good Charlotte's video for "Last Night" reconstructs the TV show "Family Double Dare," complete with host Marc Summers.
"Regulate" by Warren G. & Nate Dogg broke new ground by sampling a mellow, melodic hit from the '80s: "I Keep Forgettin'" by Michael McDonald.
"Crank That (Soulja Boy)" was the most successful digital track of 2007 in the US with 2,909,000 downloads. On January 6, 2008 it became the first song ever to sell 3 million digital copies in the States.
Eric Clapton wrote "Layla" about his love for Pattie Harrison, who was married to George Harrison at the time. He eventually married Pattie, and managed to stay friends with George.
Jethro Tull lead singer Ian Anderson wrote "Aqualung" after looking at pictures of homeless men that his wife took. She got a co-writing credit on the song.
The longtime BS&T frontman tells the "Spinning Wheel" story, including the line he got from Joni Mitchell.
The drummer and one of the primary songwriters in Grand Funk talks rock stardom and Todd Rundgren.
Billie Jean, Delilah, Sara, Laura and Sharona - do you know who the girls in the songs really are?
In the name of song explanation, Al talks about scoring heroin for William Burroughs, and that's not even the most shocking story in this one.
Justin wrote the classic "Nights In White Satin," but his fondest musical memories are from a different decade.
Was Justin the first to be Punk'd by Ashton Kutcher? Did Britney really blame him for her meltdown? Did his bandmates think he was gay?