The Roots have stumbled across a surprising amount of commercial potential since signing on as the band on Jimmy Fallon's Tonight Show, and it's given them some interesting opportunities. Today they share a song called "Bittersweet," which is a collaboration with Belgian beer company Stella Artois. The song is meant to create a "taste" sensation through music, and thus, the group has recorded two versions of the record, one "bitter," and one "sweet." While the style of the songs changes, the verses from emcee Black Thought remain the same. Is it a successful experiment? Let us know which version you prefer below.