"I'm So Glad" is a song originally recorded by Skip James in 1931. The song is derived from a song written in 1927 by Art Sizemore and George A. Little entitled "So Tired" and first recorded that same year by Curley Huber. It was covered by Cream on their first album,Fresh Cream, then later put on their last studio album Goodbye as a live performance, and also by Deep Purple on their first album Shades of Deep Purple. Their version is introduced by their own arrangement called "Prelude: Happiness".