Kacey Musgraves offered "Follow Your Arrow" to her friend Katy Perry, but Perry thought Musgraves should record the song herself, telling Kacey it seemed "like something that you would totally say."
"Brad Paisley's "River Bank" was inspired by his childhood growing up 500 yards from the Ohio River.
"Torn" by Natalie Imbruglia was first recorded by the group Ednaswap in 1993. It was written by Ednaswap's Anne Previn and Scott Cutler, who went on to write some hits for Miley Cyrus.
"Pink Cadillac" was a B-side for Bruce Springsteen in 1984, but after Aretha Franklin sang about pink Cadillacs on "Freeway Of Love" the following year, Natalie Cole covered the song and had a hit with it in 1988.
"Do They Know It's Christmas?" by Band-Aid was the first big group charity single. It was organized by Bob Geldof, who a year later put together "We Are The World" and Live Aid.
"Free Fallin'" by Tom Petty is set in Los Angeles, as he mentions Reseda, Mulholland and Ventura Boulevard.
Test your metal - Priest, Maiden, and Beavis and Butt-head show up in this one.
Shaun breaks down the Seether songs, including the one about his brother, the one about Ozzy, and the one that may or may not be about his ex-girlfriend Amy Lee.
Dave reveals the inspiration for "Feelin' Alright" and explains how the first song he ever wrote became the biggest hit for his band Traffic.
Holly Knight talks about some of the hit songs she wrote, including "The Warrior," "Never" and "The Best," and explains some songwriting philosophy, including how to think of a bridge.
They sang about pink torpedoes and rocking you tonight tonight, but some real lyrics are just as ridiculous. See if you can tell which lyrics are real and which are Spinal Tap in this lyrics quiz.
Dan cracked the Top 40 with "Ritual," then went to India and spent 2 hours with the Dalai Lama.