Which country was Dora Luz's work in The Three Caballeros premiered in? 
Dora Luz:  She is known for her performance in Walt Disney's "The Three Caballeros" (1944), in which she sings Agustín Lara's "You Belong to My Heart" to Donald Duck. The Three Caballeros:  The film premiered in Mexico City on December 21, 1944.
i don't know