John Cathal O’Brien – Masterpiece by Yee and O’brien (Spotify) John Cathal O’Brien – Masterpiece by Yee and O’brien (Spotify) Masterpiece' is the latest single from singer-songwriter John Cathal O'Brien and composer Jean Marc Yee. Recorded in NYC by Yee & O'Brien Categories: Audio, Pop, The Latest|Tags: Indie, John Cathal O'Brien, Singer Songwriter|