Guitar,Piano,Vocal,Voice - Level 3 - Digital Download SKU: A0.1499075 By Billie Eilish. By Billie Eilish O'Connell and Finneas O'Connell. Arranged by Teresa Young. Pop,Rock,Singer/Songwriter. Score. 9 pages. Teresa Young #1075121. Published by Teresa Young (A0.1499075). Teresa Young's piano-centric arrangement of Billie Eilish's powerful breakup ballad Happier Than Ever came about so her vocalist granddaughter could interpret it. Consider it a pro vocal accompaniment, with the piano part complementing the vocal melody rather than doubling it. The arrangement also mirrors the original in emotional tone, beginning with a quiet first section, then escalating throughout to an intense finish. It includes guitar chord diagrams.