A dancer with the Portela samba school dances on a float during the first night of carnival parade in Rio
A dancer with the Portela samba school dances on a float during the first night of carnival parade at the Sambadrome in Rio de Janeiro on February 19, 2012. Rio's Carnival celebrations reached their peak with the start of the sumptuous parades at the city's hallowed Sambadrome -- a riotous frenzy of skin, sweat, sequins and music.