In the late 1960s her physique became athletic and voluptuous, in contrast to the slimness it had in her early years, and she had cosmetic surgery on her nose to improve her facial appearance.

In 1964 she made her first appearance at the Teatro Lírico in Mexico City, where other prominent figures such as Tin Tan, El Santo and Sergio Corona performed.

In 1968 she joined the cast of the cabaret El Capri, where she worked alongside vedettes such as Yolanda "Tongolele" Montes and the Argentine Zulma Faiad.

Her performances alternated with singers such as Celia Cruz, Enrique Guzmán, Mike Laure, Sonia Lopez and Dámaso Pérez Prado.

In the theatre she acted in several comic plays, in which she was directed by Óscar Ortiz de Pinedo, Rafael Banquells, Jose Diaz Morales and others.

In 1999, Mendoza took part in the theater show Las inolvidables de la noche, in which the vedettes Amira Cruzat, Wanda Seux, Grace Renat and Malú Reyes also appeared.

In 2016 Mendoza, along with the vedettes Olga Breeskin, Lyn May, Wanda Seux and Princesa Yamal, was the subject of the Mexican documentary film Beauties of the Night directed by María José Cuevas.