Christina Aguilera did her "Beautiful" vocal in one take; the opening line, "Don't look at me," is something she said to her friend in the studio who was there to offer support.
The thunderclap sound heard in the Bee Gees song "Tragedy" was made by Barry Gibb with his mouth.
Train wrote the 2011 song "Brand New Book" for the TV show The Biggest Loser - part of the song was used in the opening credits.
"True" by Spandau Ballet has some lyrics based on parts of the Vladimir Nabokov novel Lolita, including "Take your seaside arms," which in the book is "That little girl with her seaside limbs."
Every film star mentioned in Madonna's "Vogue" has since died. The last was Lauren Bacall, who passed away in 2014.
The moans of pleasure in the Guns N' Roses song "Rocket Queen" are authentic.
Untangling the events that led to the "Stairway To Heaven" lawsuit.
Was Janet secretly married at 18? Did she gain 60 pounds for a movie role that went to Mariah Carey? See what you know about Ms. Jackson.
Gramm co-wrote this gorgeous ballad and delivered an inspired vocal, but the song was the beginning of the end of his time with Foreigner.
Dan cracked the Top 40 with "Ritual," then went to India and spent 2 hours with the Dalai Lama.
Paul Stanley on his soul music project, the Kiss songs with the biggest soul influence, and the non-make-up era of the band.
Inspired by his dear friend, "Seasons in the Sun" paid for Terry's boat, which led him away from music and into a battle with Canadian paper mills.