A float from the Beija Flor samba school parades through the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

King Momo, the crowned and costumed Milton Rodrigues, flanked by the Carnival queen and two princesses, pose for pictures during carnival celebrations in Rio de Janeiro, Brazil. King Momo is the mythical figure who reigns over the chaos of Carnival, and officially opened this seaside city's five-day annual exaltation of music, booze and flesh. (Photo by Rodrigo Abd/Associated Press)

A reveller of the Mancha Verde samba school dances in front of a float at the Sambadrome. (Photo by Mauricio Lima/AFP)

A Sao Clemente samba school dancer performs at the Sambadrome in Rio de Janeiro. (Photo by Rodrigo Abd/Associated Press)

Dancers from the Renascer de Jacarepagua samba school dance alongside a float during a parade at the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

A dancer of Beija Flor samba school parades during carnival celebrations at the Sambadrome in Rio de Janeiro,on February 20, 2012. (Photo by AP Photo/Felipe Dana)

The Portela samba school parades during celebrations at the Sambadrome in Rio de Janeiro. (Photo by Victor R. Caivano/Associated Press)

A performer from the Renascer de Jacarepagua samba school dances at the Sambadrome in Rio de Janeiro. (Photo by Silvia Izquierdo/Associated Press)

The Imperatriz Leopoldinense samba school parades during celebrations at the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

A reveller of the Nene de Vila Matilde samba school dances ahead of a float during at the Sambadrome in Sao Paulo. (Photo by Mauricio Lima/AFP)

A reveller from the Aguia de Ouro samba school dances at the Sambadrome in Sao Paulo. (Photo by Mauricio Lima/AFP)

A dancer performs during the Carnival parade of the Imperio de Casa Verde samba school in Sao Paulo. (Photo by Andre Penner/Associated Press)

A dancer performs during the parade of the Tom Maior samba school in Sao Paulo. (Photo by Andre Penner/Associated Press)

Members of the Salgueiro samba school parade on a float at the Sambadrome in Rio de Janeiro. (Photo by Rodrigo Abd/Associated Press)

A member of the Mocidade Independente samba school parades at the Sambadrome in Rio de Janeiro. (Photo by Rodrigo Abd/Associated Press)

A woman dances amid orange smoke during the “Bloco da Lama”, or Mud Block parade in Paraty. (Photo by Rodrigo Abd/Associated Press)

Women dance during the carnival gay and lesbian ball at the Jockey Club in Rio de Janeiro, Brazil, on February 21, 2012. (Photo by AP Photo/Victor R. Caivano)

Revelers sing during a “Ceu na Terra” street parade in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

Brazilian comedian Sabrina Sato performs during the parade of the Gavioes da Fiel samba school in Sao Paulo. (Photo by Andre Penner/Associated Press)

Dancers perform on a float during the parade of the Mancha Verde samba school in Sao Paulo. (Photo by Andre Penner/Associated Press)

Dancers from the Mancha Verde samba school perform in Sao Paulo. (Photo by Andre Penner/Associated Press)

Revellers of the Unidos do Peruche samba school sing and dance at the Sambadrome in Sao Paulo, Brazil. (Photo by Mauricio Lima/AFP)

A reveler participates in the Banda de Ipanema parade in Rio de Janeiro. (Photo by Silvia Izquierdo/Associated Press)