Zayn's "Pillowtalk" reached #1 on the Hot 100, something his former One Direction bandmates never achieved.
"Total Eclipse Of The Heart" by Bonnie Tyler is a tribute to the vampire movie Nosferatu, depicting an immortal "love in the dark."
The lyrics for Lesley Gore's "It's My Party" were based on actual events relating to his daughter Judy's sweet 16 party. The teenager threw a tantrum and burst into tears when her mum and dad insisted that her grandparents had to be invited.
Sia Furler wrote “Titanium” and originally wanted to give the tune to Katy Perry. She turned it down so David Guetta recorded it instead using Sia's original demo guide vocal.
"I Won't Back Down" is a very personal song for Tom Petty. "I thought it wasn't that good because it was so naked," he said.
Damon Albarn found inspiration for Blur's "Girls And Boys" whilst on holiday in Magaluf on the Spanish island of Majorca.
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.
As a songwriter and producer, Narada had hits with Aretha Franklin, Whitney Houston, Mariah Carey and Starship. But what song does he feel had the greatest impact on his career?
In her days with The Runaways, Joan Jett saw The Arrows perform "I Love Rock And Roll," which Alan Merrill co-wrote - that story and much more from this glam rock pioneer.
Charlie discusses the songs that made him a Southern Rock icon, and settles the Devil vs. Johnny argument once and for all.
Brenda talks about the inspiration that drove her to write hit songs like "Get Here" and "Piano in the Dark," and why a lack of formal music training can be a songwriter's best asset.