TTBB Chorus,Voice - Level 4 - Digital Download SKU: A0.1472919 By Theo Katzman. By Theo Katzman and Tyler Andrew Duncan. Arranged by Adam Bock. 21st Century,A Cappella,Barbershop,Pop,Singer/Songwriter. Barbershop Quartet. 8 pages. ADAM BOCK #1050552. Published by ADAM BOCK (A0.1472919). A pretty faithful acapella quartet interpretation of Theo Katzman's amazing song.