Instrumental Duet Instrumental Duet,Piano - Level 1 - Digital Download SKU: A0.747289 By Hillsong LIVE. By Eric Liljero, Jonas Myrin, and Reuben Morgan. Arranged by Hillsong. Contemporary. Score and parts. 5 pages. Christopher Brown #5044809. Published by Christopher Brown (A0.747289). Hillsong's worship song Cornerstone arranged as a beginner/easy piano duet.Included In Your PurchasePrimo & Secondo parts (matching opposite pages).