Easy Piano - Level 2 - Digital Download SKU: A0.1346625 By Swedish House Mafia Featuring John Martin. By Axel Hedfors, Martin Lindstrom, Michel Zitron, Sebastian Ingrosso, and Steve Angello. Arranged by eduardo. Pop,Rock,Romantic Period. Score. 8 pages. O_Talentoso #931048. Published by O_Talentoso (A0.1346625). Swedish House ft. John Martin-Don't You Worry Child (Piano Cover) + SHEET Partitura Intermediary.