Roger reveals the songwriting formula Clive Davis told him, and if "Eight Miles High" is really about drugs.
The man who created Yacht Rock with "Sailing" wrote one of his biggest hits while on acid.
Have you got the smarts to know which of these graduation song stories are real?
Does Angus really drink himself silly? Did their name come from a sewing machine? See if you can spot the real stories about AC/DC.
The Evanescence frontwoman on the songs that have shifted meaning and her foray into kids' music.
When he was asked to write a song for the Singles soundtrack, Mark thought the Seattle grunge scene was already overblown, so that's what he wrote about.