"Airplanes" by B.o.B was written by Lupe Fiasco, who recorded it but decided to pass.
The love is growing in the '70s hit "Love Grows (Where My Rosemary Goes)" because rosemary is the name of an herb.
"Mother" by Danzig is about censorship, specifically the Parents Music Resource Center, which pushed record labels to put warning stickers on albums with explicit lyrics.
Ariana Grande's collaboration with Zedd, "Break Free" came about after the Russian-German producer overheard Grande performing at a label showcase while he was backstage, and he mentioned to his team that he wanted to work with her.
"Ghosttown" from 2014 was Madonna's 45th chart-topper on the Dance Club Songs chart, breaking the record for the most #1s an artist has tallied on a single Billboard chart.
"Just Dance" was Lady Gaga's first hit, and it also brought the techno-synth sound that had been popular in Europe for the previous decade to the United States.
Songwriting Hall of Famer Linda Perry talks about her songs "What's Up" and "Beautiful," her songwriting process, and her move into film music.
The lead singer on "Da Doo Ron Ron" and "Then He Kissed Me," La La explains how and why Phil Spector replaced The Crystals with Darlene Love on "He's A Rebel."
The revered singer-songwriter talks inspiration and explains why she put a mahout in "Drop the Pilot."
The Guns N' Roses rhythm guitarist in the early '90s, Gilby talks about the band's implosion and the side projects it spawned.
The men of Sparks on their album Hippopotamus, and how Morrissey handled it when they suggested he lighten up.
The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.