Formed within the U.S. by Mexican vocalist Ubaldo Martínez, accordionist/keyboardist Enrique Gómez, and bassist Carlos Alcara, the onda grupera clothing Los Pioneros had been soon joined up with by guitarist Roberto Reyes and drummer Jorge Rodríguez. The quintet mainly plays a variety of Colombian cumbia and norteño, the Mexican dance music powered by accordion and bass. Los Pioneros registered with Univision GROUP and teamed up with manufacturer Elio Espino before launching Por Fin, offering the hit one “Quinceañperiod.”