The performance of Angela Gheorghiu as Violetta has attracted the attention of another Violetta of the present (Anna Netrebko), who will likely be a future interpreter of the role here in New York. And at least one Violetta of a past generation is expected to pay a courtesy call: Virginia Zeani has accepted an invitation to one of Gheorghiu’s performances later this month. La Cieca has succumbed to Gheorghiu fever as well, posting clips of her Marguerite on YouTube.