Celebration of the 50th Anniversary of Mme. Thebom’s Met debut. Gala dinner followed by a multi-media program and comments from distinguished colleagues, including: Licia Albanese, Lucine Amara, Gabor Carelli, Robert Merrill, Patrice Munsel, Delia Rigal, Theodor Uppman; Anthony Coggi, Master of Ceremonies. Liederkranz Foundation; Friday, 6:00 p.m.