It’s been 10 years since Gnarls Barkley released St. Elsewhere, and Danger Mouse is celebrating their two-time Grammy Award–winning album with an unreleased remix of their biggest hit, “Crazy.”

Danger Mouse dug deep in the vault and dropped a slower version of the track. Whereas the original version featured glaring bass and vibrant sounds, this remixed version is like a whisper -- with it’s dialed-down production and smooth acoustic guitar. With a soft loop of synchronized humming in the background, Cee Lo Green sings the lyrics, “Maybe I’m crazy? / Maybe you’re crazy? / Maybe were crazy … Possibly.”

Danger described the track as a “weird remix I did back in 2006 that got rejected by the label.” Along with dropping the remix, he also shared images from the 2006 studio sessions with Cee Lo, Gorillaz and more. “Crazy” was officially released on March 13, 2006, and peaked at No. 2 on the Billboard Hot 100 and topped the charts in more than five countries. The song went on to win a Grammy for Best Urban/Alternative Performance in 2007.

Listen to the rejected remix of "Crazy" below: