Piano,Viola - Level 3 - Digital Download SKU: A0.1105001 By Gnarls Barkley. By Brian Burton, GianPiero Reverberi, Gianfranco Reverberi, and Thomas Callaway. Arranged by Anya Alston. Jazz,Pop. Score and part. 8 pages. Anya Alston #708246. Published by Anya Alston (A0.1105001). Crazy by Gnarls Barkley for Viola with piano accompaniment, PDF includes full score and individual parts.