The Green Burrito fast-food chain takes the minimalist approach in its first TV campaign, featuring only a green smiley-face-type visage on a black background. The mouth moves as the face either speaks or sings -- in a calming but off-key male voice -- the ad message. Mendelsohn/Zien, Los Angeles, handles the southern California chain, part of CKE Restaurants. Copywriter: Kim Genkinger. Art director: Josh Weltman.