Polo Urías is a norteño singer and played bajo sexto]] from Ojinaga, Chihuahua Mexico. Polo Urías was formerly the lead singer of Los Rieleros del Norte, but in the 1990s, he went on to form his own band, Polo Urías y su Maquina Norteña. Some of his most popular hits are Veinte Años, Una Aventura, and Mi Primer Amor. Polo Urías was born in the rural mountains of northern Chihuahua, near the border town of Ojinaga. Urías recalls that when he was very young he would often sing in while plowing in the fields with his mules, without any accordions, guitars, or musical instruments.