Los Tres also known as The Tr3s or The 3, is a Chilean rock band. The band was formed in 1987 in Concepción by Álvaro Henríquez, Roberto Lindl, Francisco Molina and later Ángel Parra Jr. joined. They are one of the most influential rock en español bands.

Source: Wikipedia (https://en.wikipedia.org/wiki/Los_Tres)