A performer from the Imperio da Tijuca samba school parades during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Silvia Izquierdo)
Performers from the Imperio da Tijuca samba school parade on a float during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Felipe Dana)
A performer from the Imperio da Tijuca samba school parades during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Nelson Antoine)
Performers from the Imperio da Tijuca samba school parade on a float during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Felipe Dana)
Performers from the Imperio da Tijuca samba school parade during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Silvia Izquierdo)
A performer from the Imperio da Tijuca samba school parades on a float during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Felipe Dana)
Performers from the Imperio da Tijuca samba school parade on a float during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Felipe Dana)
A performer from the Imperio da Tijuca samba school parades during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Silvia Izquierdo)
A performer from the Imperio da Tijuca samba school parades on a float during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, Sunday, March 2, 2014. (AP Photo/Felipe Dana)