This April, the New York Festival of Song (NYFOS) presents "Topsy-Turvy: A Guide to Gilbert & Sullivan Gala and Dinner." There will be plenty to patter about with David Hyde Pierce (Spamalot), English tenor Hal Cazalet and A Gentleman's Guide to Love and Murder’s Lauren Worsham and Bryce Pinkham all performing selections from Gilbert & Sullivan’s classic catalog.