French street artist Lazoo spray paints a design during a demonstration at the second edition of the International Graffiti Fine Art Biennial at the Brazilian Museum of Sculpture, MuBE, in Sao Paulo, Brazil, Tuesday, January 22, 2013. The event runs from January 22 – February 24 and features work of more than 50 street artists, representing 11 countries. (Photo by Andre Penner/AP Photo)

A cat-shaped wooden sculpture designed by Brazilian street artist Minhau greets visitors just outside the Brazilian Museum of Sculpture, MuBE, marking the second edition of the International Graffiti Fine Art Biennial, in Sao Paulo, Brazil, Tuesday, January 22, 2013. (Photo by Andre Penner/AP Photo)

Brazilian graffiti artist Eduardo Kobra (C) puts the final touches to his piece of art in tribute to Brazilian architect Oscar Niemeyer, next to his assistants, at the financial center on Sao Paulo's Avenida Paulista January 22, 2013. Kobra created the 56-metre (61-yard) tall graffiti artwork as a tribute to Niemeyer, one of the 20th century's most influential modernist architects. Niemeyer died in December 2012, aged 104. (Photo by Andre Penner/AP Photo)

Brazilian graffiti artist Eduardo Kobra puts the final touches to his piece of art in tribute to Brazilian architect Oscar Niemeyer, at the financial center on Sao Paulo's Avenida Paulista January 22, 2013. (Photo by Andre Penner/AP Photo)

Nederlander street artist Karski takes a moment to appraise the formation of his graffiti art during a demonstration at the second edition of the International Graffiti Fine Art Biennial at the Brazilian Museum of Sculpture, MuBE, in Sao Paulo, Brazil, Tuesday, January 22, 2013. (Photo by Andre Penner/AP Photo)

Brazilian graffiti artist Eduardo Kobra (C) puts the final touches to his piece of art in tribute to Brazilian architect Oscar Niemeyer, next to his assistants, at the financial center on Sao Paulo's Avenida Paulista January 22, 2013. Kobra created the 56-metre (61-yard) tall graffiti artwork as a tribute to Niemeyer, one of the 20th century's most influential modernist architects. Niemeyer died in December 2012, aged 104. (Photo by Andre Penner/AP Photo)

A visitor walks past a graffiti mural created by French street artist Noetwo, on display during the second edition of the International Graffiti Fine Art Biennial at the Brazilian Museum of Sculpture, MuBE, in Sao Paulo, Brazil, Tuesday, January 22, 2013. (Photo by Andre Penner/AP Photo)

A graffiti creation by Canadian artist Shalak is on display during the second edition of the International Graffiti Fine Art Biennial at the Brazilian Museum of Sculpture, MuBE, in Sao Paulo, Brazil, Tuesday, January 22, 2013. (Photo by Andre Penner/AP Photo)

A panel, foreground, shows graffiti art painted by Portugal artist Odeith on display during the second edition of the International Graffiti Fine Art Biennial at the Brazilian Museum of Sculpture, MuBE, in Sao Paulo, Brazil, Tuesday, January 22, 2013. (Photo by Andre Penner/AP Photo)

Brazilian street artist Frank spray paints a design during a demonstration at the second edition of the International Graffiti Fine Art Biennial at the Brazilian Museum of Sculpture, MuBE, in Sao Paulo, Brazil, Tuesday, January 22, 2013. (Photo by Andre Penner/AP Photo)

Brazilian graffiti artist Eduardo Kobra (C) puts the final touches to his piece of art in tribute to Brazilian architect Oscar Niemeyer, next to his assistants, at the financial center on Sao Paulo's Avenida Paulista January 22, 2013. Kobra created the 56-metre (61-yard) tall graffiti artwork as a tribute to Niemeyer, one of the 20th century's most influential modernist architects. Niemeyer died in December 2012, aged 104. (Photo by Andre Penner/AP Photo)