Justin Timberlake continued his reign on Late Night With Jimmy Fallon last night, and for his second appearance, the singer brought an old-school feel with him. Along with his Ragtime Gals, Timberlake and host Jimmy Fallon sang “SexyBack” with a barbershop group, complete with suits and choreographed dance moves. He also performed his excellent single “Mirrors.” Watch that performance above, and “SexyBack” below, and if you need more JT (because who doesn’t?) tune into Fallon all week to catch the rest of his appearances.