Martyn talks about producing Tina Turner, some Heaven 17 hits, and his work with the British Electric Foundation.
A talented lyricist, Philip helped revive Neil Sedaka's career with the words to "Laughter In The Rain" and "Bad Blood."
The men of Sparks on their album Hippopotamus, and how Morrissey handled it when they suggested he lighten up.
The Def Leppard frontman talks about their "lamentable" hit he never thought of as a single, and why he's juiced by his Mott The Hoople cover band.
Daryl Hall's TV show is a hit, and he's been inducted into the Rock and Roll Hall of Fame - only one of these developments excites him.
Ian talks about his 3 or 4 blatant attempts to write a pop song, and also the ones he most connected with, including "Locomotive Breath."
"Free Fallin'" by Tom Petty is set in Los Angeles, as he mentions Reseda, Mulholland and Ventura Boulevard.
Jeff Lynne sang the word "groose" in the chorus of "Don't Bring Me Down" as a nonsense placeholder, but left it in when he found out it means "greetings" in German ("gruss").
Katy Perry says her 2008 song "Ur So Gay" is about "guys who wear the guyliner, steal your jeans, and that whole almost hipster emo scene."
The first rap song to make the Hot 100 was "Rapper's Delight" by The Sugarhill Gang in 1979. At the time, many considered rap a fad that would soon pass.
The song used in introductions by the Chicago Bulls and many other sports teams is "Sirius" by The Alan Parsons project, the opening track on the Eye In The Sky album.
Elton John had a huge hit duetting with Kiki Dee on "Don't Go Breaking My Heart," but he's also performed it with RuPaul and Miss Piggy.