Singers Juha Uusitalo (L) and Herbert Lippert (R) perform on stage during a dress rehearsal of Paul Hindemith's opera 'Cardillac' at the state opera house in Vienna October 13, 2010. The Opera is directed by Sven-Eric Bechtolf, conducted by Franz Welser-Moest, and will premiere on October 17. REUTERS/Herwig Prammer (AUSTRIA - Tags: ENTERTAINMENT)