
Train's guitarist had to Google an instructional video to learn how to play the ukulele for "Hey Soul Sister."

Lil Wayne does an unlikely rap in a remix of the Joe Jonas song "Just In Love." The pair met at the 2008 MTV Video Music Awards.

Aimee Mann's "Save Me" was inspired by her relationship with the actor Dave Foley, who had gone through a divorce and was an emotional train wreck.

Walk The Moon vocalist Nicholas Petricca got the idea for "Shut Up and Dance" when he and his girlfriend were taking forever to get drinks at a Los Angeles club bar. Petricca was getting frustrated, so his girlfriend told him to "shut up and dance with me!'"

John Lennon wrote "The Continuing Story of Bungalow Bill" about Richard Cooke, a hunter he met at the Maharishi's camp in India. Cooke hasn't shot anything since the camp, except with his camera - he became a freelance photographer for National Geographic.

"Burning Down The House" by Talking Heads was inspired by chant band members heard at a P-Funk show where the crowd yelled, "burn down the house... burn down the house."
An interview with Dr. John Covach, music professor at the University of Rochester whose free online courses have become wildly popular.
Fiona's highly-anticipated third album almost didn't make it. Here's how it finally came together after two years and a leak.
With Bernie Taupin, Martin co-wrote the #1 hits "We Built This City" and "These Dreams." After writing the Pretty Woman song for Go West, he had his own hit with "In the House of Stone and Light."
The former Metallica bassist talks about his first time writing a song with James Hetfield, and how a hand-me-down iPad has changed his songwriting.
With the rise of Kindie rock, more musicians are embracing their inner child with tunes for tots - here, we look at pop stars who recorded kids' albums.