Have the years flown that fast? Well, you tell La Cieca. She just this past weekend realized that it’s been 25 years since Beverly Sills retired from singing. To put that in persepctive, the duration of her retirement (1980 – 2005) is now exactly equal to the duration of her New York City Opera career (1955 – 1980). Yes, that means that Bev debuted at NYCO 50 years ago this year! And yet, to La Cieca, 1980 seems like, if not yesterday, then at most the day before. To mark these anniversaries (silver, silver, and gold, respectively), La Cieca is delighted to present an episode of Unnatural Acts of Opera featuring highlights from the “Beverly!” farewell gala. The show begins with a few numbers from Die Fledermaus, Act 2, starring Kitty Carlisle (Prince Orlovsky), Gianna Rolandi (Adele), Alan Titus (Eisenstein) and La Sills reprising her debut role of Rosalinda. Then out come the guests: Donald Gramm, John Alexander, Leontyne Price, Sherrill Milnes, Eileen Farrell, Renata Scotto and Placido Domingo. The program winds up with a pop/opera medley, Sills duetting with Carol Burnett. On second thought, don’t kiss yesterday goodbye: do what you can to bring it back!