Instrumental Duet,Viola,Violin - Level 2 - Digital Download SKU: A0.1217394 By Taylor Swift. By Johan Schuster, Max Martin, Shellback, and Taylor Swift. Arranged by Flávio Ageu. 20th Century,Classical,Film/TV,New Age,Pop. 5 pages. Flávio Ageu Dos Santos Silva #813940. Published by Flávio Ageu Dos Santos Silva (A0.1217394). Violin and Viola Duet.