Ernst Röhm: executed by Hitler after the Night of the Long Knives, the inspiration for this thoughtful Al Stewart track.
Ed Sheeran thought he wrote the x track "Photograph" on 6th Street in Denver, so he got a tattoo saying 6 ST. But when he returned it turned out the street was actually 6th Avenue.
The Austin Powers theme is "Soul Bossa Nova," written by Quincy Jones in 1962 - the same year the first James Bond movie was released.
Radiohead's "Harry Patch (In Memory Of)" is about the last surviving World War I veteran to fight in the trenches.
It was never a big hit, but "She's A Rainbow" became one of the most popular Rolling Stones songs in the digital age when it started showing up in commercials (iMac, Photoshop), and TV shows (American Horror Story: Coven, Ted Lasso).
"Do The Bartman," released at the peak of Simpsons-mania, has uncredited backup vocals by Michael Jackson, who later appeared on the show.
Prince kept doves at his Paisley Park mansion. And yes, sometimes they did cry.
When a song describes a wedding, it's rarely something to celebrate - with one big exception.
Rob Halford, Richie Faulkner and Glenn Tipton talk twin guitar harmonies and explain how they create songs in Judas Priest.
The outlaw country icon talks about the spiritual element of his songwriting and his Bob Dylan mention.
Steppenwolf frontman John Kay talks about "Magic Carpet Ride," "Born To Be Wild," and what he values more than awards and accolades.
The country sweetheart opines about the demands of touring and talks about writing songs with her famous father.
On Glen's résumé: hit songwriter, Facebook dominator, and member of Styx.