In the Mestizo-Mexican cultural area the three variants of "corrido" (romance, revolutionary and modern) are both alive and sung, along with popular sister narrative genres, such as the "valona" of Michoacán state, the "son arribeño" of the Sierra Gorda (Guanajuato, Hidalgo and Querétaro states) and others. Its vitality and flexibility allow original "corrido" lyrics to be built on non-Mexican musical genres, such as blues and ska, or with non-Spanish lyrics, like the famous song El Paso by Marty Robbins, and corridos composed or translated by Mexican indigenous communities or by the "Chicano" people in the United States, in English or "Spanglish". The "corrido" was, for example, a favorite device employed by the Teatro Campesino led by Luis Valdez in mobilizing largely Mexican and Mexican-American farmworkers in California during the 1960s.