1. Isobel Cooper, known professionally as Izzy, is an English soprano singer. [1] Isobel Cooper, known professionally as Izzy, is an English soprano singer. She trained at Guildhall School of Music and Drama in London. Her debut audio CD Libera Me was released in 1998. Other CD releases include Ascolta, and New Dawn. A CD compilation titled Izzy, that included a duet of "The Prayer," with American tenor Daniel Rodriguez, was released in the U.S.