Simon Cowell's most ambitious vision yet - a multinational quartet of opera singers that sound like The Three Tenors and look like Armani models - has paid enormous dividends. Comprised of renowned Spanish opera and zarzuela baritone Carlos Marin, classically trained tenors Urs Buhler (Switzerland) and David Miller (USA), and French pop singer Sebastien Izambard, the group has enraptured minds - ...