Revelers of the Unidos da Tijuca samba school perform during the second day of the carnival parade in the Sambodrome, Rio de Janeiro, Brazil on Feb. 17, 2015.

Revelers of the Imperatriz samba school perform during the second day of the Carnival parade at the Sambodrome in Rio de Janeiro, Brazil, Feb. 17, 2015.

A performer from the Uniao da Ilha do Governador samba school parades on a float during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 17, 2015.

Performers from the Unidos da Tijuca samba school parade during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 17, 2015.

A child cheers for Beija Flor samba school performers during the Carnival parade in the Sambadrome in Rio de Janeiro, Brazil, Feb. 17, 2015.

Revelers of the Imperatriz samba school perform during the second day of the Carnival parade in the Sambodrome in Rio de Janeiro, Brazil, Feb. 17, 2015.

A performer from the Academicos do Grande Rio samba school parades during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 16, 2015.

A performer from the Academicos do Grande Rio samba school dances during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 16, 2015.

The Vila Isabel samba school parade float processes forward during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 16, 2015.

Performers from the Academicos do Grande Rio samba school parade during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 15, 2015.

Members of the Mangueira samba school perform during Carnival celebrations at the Sambadrome in Rio de Janeiro, Feb. 15, 2015.

A woman cheers during the Carnival parade at the Sambodrome in Rio de Janeiro, Brazil, Feb. 15, 2015.

Performers from the Vila Isabel samba school parade during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Feb. 16, 2015.

A performer from the Mangueira samba school performs during the Carnival parade at the Sambadrome in Rio de Janeiro, Brazil, Feb. 15, 2015.

Revelers from the Salgueiro samba school perform during the Carnival parade at the Sambodrome in Rio de Janeiro, Brazil, Feb. 16, 2015.

Revelers of Vila Isabel samba school perform during their carnival parade at the Sambadrome in Rio de Janeiro, Feb. 16, 2015.

Revelers of the Vai-Vai samba school perform during the second night of carnival parade at the Anhembi Sambadrome in Sao Paulo, Brazil on Feb. 15, 2015.

Revelers pose for a picture as they watch the carnival parade in Sao Paulo, Brazil, Saturday, Feb. 14, 2015.

A reveler from the Im perioo da Casa Verde Samba School takes part in a carnival at Anhembi Sambadrome in Sao Paulo, Brazil on Feb. 15, 2015.

Revelers of the Mocidade Alegre samba school perform during the second night of carnival parade at the Anhembi Sambadrome in Sao Paulo, Brazil on Feb. 14, 2015.

A dancer from the Nene de Vila Matilde samba school performs during a carnival parade in Sao Paulo, Brazil, Saturday, Feb. 14, 2015.

Dancers from the Nene de Vila Matilde samba school perform on a float during a carnival parade in Sao Paulo, Brazil, Saturday, Feb. 14, 2015.

A dancer from the Nene de Vila Matilde samba school performs on a float during a carnival parade in Sao Paulo, Brazil, Saturday, Feb. 14, 2015.

Revelers of the Nene de Vila Matilde samba school perform during the first night of carnival parade at the Anhembi Sambadrome in Sao Paulo, Brazil on Feb. 13, 2015.

Revelers of the Tom Maior samba school perform during the first night of carnival parade at the Anhembi Sambadrome in Sao Paulo Brazil on Feb. 13, 2015.

Revelers pose at the 'Ceu na Terra' (Sky on Earth) street parade during Carnival festivities on Feb. 14, 2015 in Rio de Janeiro, Brazil. Carnival runs this year February 13-17.

Revelers of the Dragoes da Real samba school perform during the first night of carnival parade at the Anhembi Sambadrome in Sao Paulo, Brazil on Feb. 13, 2015.

Revellers from Tom Maior Samba School take part in a carnival at Anhembi Sambadrome in Sao Paulo, Brazil, Feb. 14, 2015.

Revellers from Academicos do Tucuruvi Samba School take part in a carnival at Anhembi Sambadrome in Sao Paulo, Brazil, Feb. 14, 2015.

A reveler dressed as nun sings and dances during the "Carmelitas" carnival parade in Rio de Janeiro, Brazil, Feb. 13, 2015.

Revelers perform during the "Carmelitas" carnival parade in Rio de Janeiro, Brazil, Feb. 13, 2015. Carmelitas is a band started in 1990 by a group of friends who gathered for soccer and drinks just outside a Carmelite convent. Jokes about the possibility of nuns escaping to join the party gave rise to the band, which parades twice: once at the beginning of Carnival, when the nuns escape the convent to join the fun, and then on the last day, when they return to their cloistered existence.

Revelers take part in an annual block party known as "Carmelitas", one of the many carnival parties to take place in the neighborhoods of Rio de Janeiro, Feb. 13, 2015.

Revelers dressed as nuns perform during the "Carmelitas" carnival parade in Rio de Janeiro, Brazil, Feb. 13, 2015.

The 2015 Carnival King, King Momo, Wilson Dias da Costa Neto, left, holds up the key of the city with Rio de Janeiro's Mayor Eduardo Paes, right, while the Governor Luiz Fernando Pezao looks behind them, at a ceremony marking the official start of Carnival in Rio de Janeiro, Brazil, Feb. 13, 2015.

An elderly patient in costume from the Nise de Silveira mental health institute dances during the institute's carnival parade, coined in Portuguese: "Loucura Suburbana," or Suburban Madness, in the streets of Rio de Janeiro, Brazil, Feb. 12, 2015. Patients, their relatives and institute employees held their parade one day before the official start of Carnival.

Musicians parade at a pre-Carnival street parade in the historic Centro neighborhood on Feb. 12, 2015 in Rio de Janeiro, Brazil. Carnival runs this year February 13-17.