Before he was the champ, Ali released an album called I Am The Greatest!, but his musical influence is best heard in the songs he inspired.
Did Eric Clapton really write "Cocaine" while on cocaine? This question and more in the Clapton edition of Fact or Fiction.
The guy who brought us "Stacy's Mom" also wrote the Jane Lynch Emmy song and Stephen Colbert's Christmas songs.
Rickie Lee Jones on songwriting, social media, and how she's handling Trump.
Does he have beef with Gaga? Is he Sean Lennon's godfather? See if you can tell fact from fiction in the Elton John edition.
With $50 and a glue stick, Bruce Pavitt created Sub Pop, a fanzine-turned-label that gave the world Nirvana and grunge. He explains how motivated individuals can shift culture.