Jeff the Brotherhood expanded by a third last night on Conan when Jerry Vivino from the house band added flourishes on flute to the Nashville rockers' tune "Staring at the Wall," from their new album Hypnotic Nights. Jake Orrall chugs away on guitar and sings gruff vocals while his brother Jamin anchors the tune with a rock-solid beat behind the kit. They seem to have impressed their host: "That was killer!" O'Brien said afterward.