If you aren't aware already, Briton Jacob Collier has firmly established himself as the preeminent composer, theorist, improviser, multi-instrumentalist, and vocalist of the modern era. Collier's Grammy-winning arrangement of Moon River is a thrilling exercise in form and style. A cappella arranger extraordinaire Paul Langford has taken Jacob's iconic arrangement and has meticulously set it to eight-to-twelve vocal parts on the page. While this would be one of the most difficult arrangements your choir could tackle, it would also turn out to be one of the most rewarding!