Cello,Instrumental Duet,Violin - Level 4 - Digital Download SKU: A0.1307405 By Christina Aguilera. By Mel Torme and Robert Wells. Arranged by Brenton Edgecombe. Christmas,Holiday. 2 pages. Adelaide String Duo #896687. Published by Adelaide String Duo (A0.1307405). Violin and cello duo (duet) of one of our very favourite Christmas songs. Actually, one of our very favourite songs!