![Russian soprano Anna Netrebko performs during the German TV show 'Bet, it ....?' in the southern German town of Nuremberg December 11, 2004. REUTERS/Jan Pitman/Pool JOH Stock Photo - Alamy Russian soprano Anna Netrebko performs during the German TV show 'Bet, it ....?' in the southern German town of Nuremberg December 11, 2004. REUTERS/Jan Pitman/Pool JOH Stock Photo - Alamy](https://c8.alamy.com/zooms/9/7494a60927f9402bbc0e18c5eeeacd37/2d4ck02.jpg)
Russian soprano Anna Netrebko performs during the German TV show 'Bet, it ....?' in the southern German town of Nuremberg December 11, 2004. REUTERS/Jan Pitman/Pool JOH Stock Photo - Alamy
![Russian soprano Anna Netrebko quits Royal Opera House after 'evolution' of her voice | Daily Mail Online Russian soprano Anna Netrebko quits Royal Opera House after 'evolution' of her voice | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2016/04/27/06/035615DD0000044D-0-image-m-5_1461735578498.jpg)
Russian soprano Anna Netrebko quits Royal Opera House after 'evolution' of her voice | Daily Mail Online
![Russian soprano Anna Netrebko quits Royal Opera House after 'evolution' of her voice | Daily Mail Online Russian soprano Anna Netrebko quits Royal Opera House after 'evolution' of her voice | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2016/04/27/06/1839ECDE00000578-0-image-a-1_1461735506111.jpg)