Reformed twink turned Verdi impersonator Rufus Wainwright has joined the ranks of Koch fanciers who will perform at the American Voices concert relaunching the NYCO on November 5. The Roofster will play and sing, yes, that song again, “Les feux d’artifice” from Prima Donna, providing respite from NYCO singers present and past including Samuel Ramey, Lauren Flanigan, Amy Burton, Joyce Castle, Anna Christy, Joyce DiDonato, Anthony Dean Griffey and Measha Brueggergosman. [Playbill]