Winners for the 24th Maria Callas Brazilian Singing Competition were announced this week. In the male category, 19-year-old Argentine bass Román Coccalotto took first prize, followed by Brazilian baritone Leandro Abreu in second and Mexican tenor Christopher Gonzalez in third. Brazilian sopranos swept the female category, with Elisa Braga claiming first prize, Marília Carvalho and Anna Hernandez sharing second, and {…}