Johnny Depp, Angelina Jolie, Mila Kunis and John Malkovich are just a few of the film stars who have moonlighted in music videos.
Despite appearances on Carson, Leno and a Pennebaker film, Williams remains a hidden treasure.
The head of Drake's estate shares his insights on the late folk singer's life and music.
Roger tells the stories behind some of his biggest hits, including "Give a Little Bit," "Take the Long Way Home" and "The Logical Song."
The drummer for Anthrax is also a key songwriter. He explains how the group puts their songs together and tells the stories behind some of their classics.
The rock revolutionist on songwriting, quitting smoking, and what she thinks of Rush Limbaugh using her song.