Montero's family's oral history maintained that they were descended from enslaved Africans taken to Argentina by Guillermo Brown in the mid-19th century.

[1] Montero starred in several films in what is considered to be Argentine cinema's golden age, starring alongside important stars like George Rigaud, Silvana Roth, Olga Zubarry, José Ruzzo, Guillermo Battaglia, Alberto Barcel, Enrique Chaico, Pablo Cumo, Enrique Muiño, Amalia Sánchez Ariño, and Margarita Tops.

[3] Domestically, she performed in various locations, including: Buenos Aires, Chubut, Córdoba, Mendoza, Neuquén, Jumps, San Juan, Saint Faith and Tucumán.

She also performed international, travelling to Montevideo (1957 and 1976), Santiago of Chile (1957, 1959, and 1963), Lima (1964), Porto Alegre and Saint Pablo (both in 1973).

She was also the female vocalist for Barry Moral's orchestra and Tito Alberti's "Jazz Casino".