Wikipedia
Sergio Hidalgo Paredes is a contemporary artist from Barcelona known as Sixe art or Sixeart. He started to paint graffiti in the late 1980s. In the mid-90s he developed his multidisciplinary talents in the fields of sculpture and studio painting. In 2008, Sixeart, Blu, Faile, JR, Nunca, Os Gêmeos painted the Tate Modern in London for the exhibition Street Art. Sixeart belongs to the collective El Equipo Plástico with the artists Nuria Mora, Nano4814 and Eltono.
Kati Krause wrote in the Wall Street Journal:"Sergio Hidalgo, alias Sixeart,... who was one of the artists featured in the Tate Modern exhibition, started scrawling his name on the walls of his native Badalona, a suburb of Barcelona, in the late '80s, when graffiti was still a novelty in Spain. Despite lacking a formal artistic training, he decided to add a paintbrush and canvas to his usual tools, to great effect: His surrealist, childlike style struck a chord with audiences and art collectors the world over. Today, he is being mentioned -- and exhibited -- together with the likes of Joan Miró and Antoni Tàpies."