The German soprano Diana Damrau recently sang eight songs by Richard Strauss, and Zerbinetta’s aria from his opera “Ariadne auf Naxos” with the MET Orchestra under James Levine. Her voice is ravishingly beautiful, with enough power to cut through and sail above the orchestra, clearly showing her operatic roots, yet capable of drawing listeners into the soft, intimate songs with a wonderfully floating quality. But it was her coloratura that left the audience gasping in disbelief. Her last song, “Amor” – unfamiliar for good reason – was a tour de force of trills, roulades and other acrobatics. The aria, one of the most spectacular display pieces in all opera, was dazzling; she acted it out with humorous, ironic gestures and facial expressions, tossing off the fireworks with incredible brilliance. It brought the house down, so she repeated the last section; but this time, she stood cheek to cheek with Levine, one foot on his podium, both mugging with gleeful abandon and having a wonderful time.