Russell apparently divorced his third wife, Velia Sánchez Belmont, sometime in the early 1960s (a September 7, 1963, newspaper article states that his new romance was the Countess Joaquina de Navas of Madrid). His television show in Argentina ended in 1964. His waning popularity was also evidenced by the popularity of a new wave of younger singers in Mexico, such as César Costa, Enrique Guzmán, and Alberto Vásquez, who in many ways, were his musical heirs. They took up the mantle that he had initially carried into Mexico, and these young singers performed Spanish covers of American and British Invasion hit songs of the 1960s to an enthusiastic, young female fan base, as Russell had once done as a crooner in the 1940s. Furthermore, and most tellingly, these younger singers were Mexican nationals, unlike Russell who was an American of Mexican ancestry.