During the Strauss scene, "surprise party guests" Swensen, Charles Castronovo, Villarroel, Mark Devan, Alagna, and Gheorghiu sang songs and arias, with Gheorghiu joining Domingo for "Lippen schweigen" from Lehšr's The Merry Widow and all of the guests accompanying Alagna and Gheorghiu in the toast ("Libiamo ne' lieti calici") from Verdi's La traviata.
Photos by Robert Millard.