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.
How the American gangsta rappers made history by getting banned in the UK.
Joe talks about the challenges of of making a Duke Ellington tribute album, and tells the stories behind some of his hits.
With the band in danger of being dropped from their label, Alice Cooper drummer Neal Smith co-wrote the song that started their trek from horror show curiosity to the Rock and Roll Hall of Fame.
Soul music legend Bill Withers on how life experience and the company you keep leads to classic songs like "Lean On Me."
Did Eric Clapton really write "Cocaine" while on cocaine? This question and more in the Clapton edition of Fact or Fiction.