They were fun and fabulous, in their best evening dresses, as they flocked last night to the Alice Tully Hall for Youth America Grand Prix (YAGP) 2023. It was the Stars of Today Meets the Stars of Tomorrow Gala. YAGP Founder Larissa Saveliev and Board Chair Richard Osterweil welcomed guests as they filled the theater. The gala chair, Marcella Hymowitz, looked stunning in pink chiffon, or…