Is Joyce DiDonato the world’s best Rossini singer?, asked the New York magazine Opera News after the American mezzo sang the finale of La Cenerentola at Carnegie Hall in January 2009. That title certainly seemed hers by sovereign right, it continued; Her phrasing was silky, her timbre rich and glowing, and her ornaments were impeccably stylish and utterly beguiling. Most impressive was DiDonato’s combination of immaculate technical control with an air of wild, unstoppable joy. This was truly a moment to treasure from an artist who is at the very top of her game.