I Can’t Stop Watching Justin Timberlake’s Barbershop Version of “SexyBack” [VIDEO]

Justin Timberlake is promoting his new album, The 20/20 Experience, all week long on Late Night with Jimmy Fallon. On last night's episode, JT teamed up with the show's four writers to form "The Ragtime Gals," a barbershop group who performed an adorable cover of "SexyBack." This may be the most charming thing JT has ever done. Jessica Biel, you are one crazy lucky woman!