[1] Fernández joined her family band, Los Tres San Miguel at the age of nine—which consisted of her uncles (her mother's brothers).
Rosita Fernandez’s voice and participation promoted Mexican Americans to purchase for beer and tortillas.
Since Rosita Fernandez pushed for more traditional roots for Mexican Heritage, promotion of Texas in more than just songs were on her agenda.
Rosita Fernandez played minor roles in such movies like Giant (1956), The Alamo (1960), Sancho the Homing Steer (1962), and Seguin (1982).
She was a woman of color acting in movies that were majority white actors/actresses but in her role, it was a big one for the Mexican American Community.
)[1] In her late career she became an Ambassador for the city of San Antonio, eventually writing a song titled the same thing.
She chose to career less mainstream for her love for the city of San Antonio, choosing money, international fame, and a life of luxury for promotion of Mexican American Heritage.
She was called Old Mexico due to her representation of the culture; she also changed the yellow rose of Texas to Rosa San Antonio which gave Mexican American women a light.
Rosita Fernandez’s investment of preserving San Antonio through her public singing in such events as Night in Old Mexico.
She did more for the city of San Antonio commercially through her jingles and radio shows promoting Mexican American consumer items like food and supplies.
The China Poblana was a racist form, Rosita used it to represent feminism for Mexican American women as breaking through the norms.
Fernández is part of the Smithsonian Collections at the National Museum of American History with her china poblana dress, which was made in the 1960s.
[2] In 1967, San Antonio radio station KCOR recognized Fernandez as a "source of entertainment" at the riverwalk, convention centers, and for her public performances at charity events.