Will.I.am, literally dreamt up "I Gotta Feelin'." Said the Black Eyed Pea: "Have you ever had a dream where there's a melody in your dream? I'll wake up out of my sleep and record that! 'I Gotta Feelin' was one of those songs."
Willa Ford came up with her hit "I Wanna Be Bad" when her record company told her to tone down her music in a effort to differentiate her from Britney Spears and Christina Aguilera, who were in their "bad girl" eras.
David Gilmour really was "Learning To Fly" when he co-wrote the Pink Floyd song - the aviation jargon came from his lessons.
Aretha Franklin didn't drive, but one of her biggest hits was a car song: "Freeway Of Love."
John Lennon's lead guitar work on Yoko Ono's "Walking On Thin Ice" proved to be his final creative act. It was upon their return home after completing laying down the track that Lennon was murdered by Mark David Chapman.
We were all party rocking in 2011 with the global smash "Party Rock Anthem," but rap fans know the "Everyday I'm shufflin'" line is a take on "Everyday I'm hustlin'" from the 2006 Rick Ross track "Hustlin'."
"Great songwriters don't necessarily have hit songs," says Chris. He's written a bunch, but his fans are more interested in the intricate jams.
Hitmaker Carl Sturken on writing and producing for Rihanna, 'N Sync, Christina Aguilera, Kelly Clarkson, Donny Osmond, Shakira and Karyn White.
The Red Hot Chili Peppers have some rather unusual song titles - see if you can spot the real ones.
The evolution of the symbol that was Prince's name from 1993-2000.
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.
Wilder's hit "Break My Stride" had an unlikely inspiration: a famous record mogul who rejected it.