Since he was a boy he had a great passion for music, he learned to play the guitar and write songs, he was only ten years old and he was already composing his own songs.
In 2002 he traveled to the city of Santiago de Chile to study psychology, another of his great passions. But in 2003 he was encouraged to participate in the second generation of the program “Rojo”, becoming the winner of the group of singers and where I can also record his first album simply called “Mario Guerrero” thanks to the Chilean Warner Music label.
This first album became double platinum and some of his songs quickly reached the top of the national radio stations. Shortly after, would receive the Apes Award, as a revelation artist, by the Society of Show Journalists.
He was doing so well that two years later he can record his second album entitled “I carry you in the soul”. He is selected to appear in the film that was made thanks to the large audience that Rojo had, which was called Red, The Movie.
Mario was fascinated with the success he had achieved in such a short time, and all this thanks to music, so he prefers to dedicate himself fully to it and postpones his psychology studies for the future.
In 2007 he was invited to participate as a folk jury of the Viña del Mar International Song Festival. He was able to sing some songs and although he was a bit nervous at first, he was able to conquer the public who did not stop singing his songs with him.
He was the interpreter of the main theme of the soap opera “Maria’s heart” and a year later he released his second album called “Footprints of yesterday”, with songs already turned into big hits like malagueña and angel skin.
2008 would be a very important year for Mario since he was able to offer a new record production, he returned to television in the program “The dance of TVN” and he was able to compose the hymn, on the occasion of the Telethon’s 30th birthday, next to Alberto Plaza.
Mario Guerrero won the Copihue de Oro award as the best national singer, this recognition is only given by the public through voting.
In 2009 he produced a new album “I will love you” an album with unpublished songs that sounded in the first positions of the radio stations and that made the young singer one of the best balladeers of their country.
In Easter 2010 he appeared in the montage of “Jesus Christ Superstar”, at the Nescafe theater with an enormous acceptance of the public, managing to sell all the tickets for the four performances that the play had.
Warrior released his single Vou te Amar, a Portuguese version of his latest album, at the end of 2010 and beginning of 2011 with the support of Perlla, a consecrated Brazilian artist.