Cello,Instrumental Duet,Violin - Level 5 - Interactive Download SKU: A0.1217676 By Swedish House Mafia Featuring John Martin. By Axel Hedfors, Martin Lindstrom, Michel Zitron, Sebastian Ingrosso, and Steve Angello. Arranged by Sarah James & Jaya Hanley of The Chapel Hill Duo. This edition: Interactive Download. Classical,Pop,Wedding. 8 pages. Duration 241. The Chapel Hill Duo #9kViVCnBTSGw6kSbokKnX. Published by The Chapel Hill Duo (A0.1217676). Key: B minor.Violin & Cello duet version of Don't You Worry Child by Swedish House Mafia, as performed by The Chapel Hill Duo. Perfect for Weddings and other performances. Advanced level suitable for professional and enthusiastic amateurs.