"Anaconda" was originally recorded by Missy Elliott in 2012, but she decided to shelf the track so it went to Nicki Minaj, who released it two years later.
Bob Seger's song "Beautiful Loser" was inspired by book Leonard Cohen published in 1966 called Beautiful Losers.
Feist's "1234" is "about lost love, and the hope to recapture what you once had," but it's best known for the Sesame Street version about counting to four.
Staind's big moment came in 1999 when lead singer Aaron Lewis played "Outside" on Limp Bizkit's Family Values tour. The live, acoustic version earned lots of radio play.
The first big hit by an X Factor winner was "Bleeding Love" by Leona Lewis, who won the British version of the show in 2008. The song was intended for Jesse McCartney, who wrote it with Ryan Tedder.
"All Star" was written as a confidence builder for fans who were bullied for liking Smash Mouth.
Justin wrote the classic "Nights In White Satin," but his fondest musical memories are from a different decade.
A popular contemporary folk singer, Williams still remembers the sticky note that changed her life in college.
A band so baffling, even their names were contrived. Check your score in the Ramones version of Fact or Fiction.
You may not recognize his name, but you will certainly recognize Peter Lord's songs. He wrote the bevy of hits from Paula Abdul's second album, Spellbound.
Franti tells the story behind his hit "Say Hey (I Love You)" and explains why yoga is an integral part of his lifestyle and his Soulshine tour.
"When seeds that you sow grow by the wicked moon/Be sure your sins will find you out/Your past will hunt you down and turn to tell on you."