Ranchera José Alfredo Jiménez, Lola Beltrán, Lucha Villa, Pedro Infante, Rocío Dúrcal, Vicente Fernández, and presently: Pedro Fernández and Pepe Aguilar. The word "ranchera" was derived from the word "rancho" because the songs originated on the ranches and in the countryside of rural Mexico. Rancheras that have been adapted by "conjuntos", or norteño bands from northern Mexico and the southwestern US, are sometimes called "norteños", from the Spanish word for "northern". Ranchera singers often wear "charro" outfits which indicates a cowboy suit with tight pants, a short jacket, a bow and riding boots. Mariachi bands, which are the music source behind
Mariachi problems recruiting mariachi instructors as many of these do not have required teaching credentials. For this reason, schools often hire trained musicians from outside the mariachi tradition. Many traditional mariachis are concerned that standardization will lead to fossilization and restrict improvisation. Other innovations in the United States have been the incorporation of styles of artists such as Elvis Presley, Freddy Fender and Glenn Miller, as well as the heavy-metal Mariachi band Metalachi. Another is the encouragement of female mariachis including all-female Mariachi groups such as Mariachi Mujer 2000 and Mariachi Divas de Cindy Shea. Mariachi Mujer has performed with Mexican