A reveller from the Sao Clemente samba school takes part in a parade on the second night of the annual Carnival parade in Rio de Janeiro's Sambadrome, on February 20, 2012. (Photo by Reuters/Ricardo Moraes)

A dancer from the Dragoes da Real samba school performs in Sao Paulo. (Photo by Andre Penner/Associated Press)

Dancers from the Dragoes da Real samba school perform in Sao Paulo. (Photo by Andre Penner/Associated Press)

A dancer from the Aguia de Ouro samba school performs in Sao Paulo. (Photo by Andre Penner/Associated Press)

A dancer from the Mocidade Alegre samba school performs in Sao Paulo. (Photo by Andre Penner/Associated Press)

A dancer of the Gavioes da Fiel samba school performs in Sao Paulo. (Photo by Andre Penner/Associated Press)

Dancers from the Portela samba school dance on a float at the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

A dancer from the Mocidade samba school performs at the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

Performers from the Mocidade Independente de Padre Miguel samba school join in the celebrations at the Sambadrome in Rio de Janeiro. (Photo by Silvia Izquierdo/Associated Press)

A Beija Flor samba school dancer performs at the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

A dancer from the Porto da Pedra samba school performs at the Sambadrome in Rio de Janeiro, Brazil. (Photo by Felipe Dana/Associated Press)

Brazilian model Gisele Bundchen dances on a Vila Isabel samba school float during carnival celebrations in the Sambadrome in Rio de Janeiro, Brazil, early Monday March 7, 2011. (Photo by AP Photo/Rodrigo Abd)

Performers from the Beija Flor samba school join the celebrations at the Sambadrome in Rio de Janeiro. (Photo by Victor R. Caivano/Associated Press)

Revellers of the Beija Flor samba school perform atop a float at the Sambadrome in Rio de Janeiro. (Photo by Vanderlei Almeida/AFP)

Members of the Uniao da Ilha samba school parade during carnival celebrations at the Sambadrome in Rio de Janeiro. (Photo by Rodrigo Abd/Associated Press)

A member of the Uniao da Ilha samba school parades during carnival celebrations at the Sambadrome in Rio de Janeiro. (Photo by Rodrigo Abd/Associated Press)

Revelers dance during the Beija Flor samba school parade at the Sambadrome in Rio de Janeiro. (Photo by Victor R. Caivano/Associated Press)

A dancer from the Mangueira samba school performs in Rio de Janeiro, Brazil. (Photo by Felipe Dana/Associated Press)

Dancers from the Salgueiro samba school perform at the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

Couples dance during the Sao Clemente samba school's parade at the Sambadrome in Rio de Janeiro. (Photo by Victor R. Caivano/Associated Press)

Dancers from the Sao Clemente samba school perform on a float at the Sambadrome in Rio de Janeiro. (Photo by Victor R. Caivano/Associated Press)

Dancers from the Sao Clemente samba school perform at the Sambadrome in Rio de Janeiro. (Photo by Felipe Dana/Associated Press)

A dancer from the Uniao da Ilha samba school performs at the Sambadrome in Rio de Janeiro. (Photo by Silvia Izquierdo/Associated Press)