RIO DE JANEIRO (AP) — Rio de Janeiro's mayor handed over the key to the city to its Carnival monarch on Friday, opening King Momo's five-day reign over the festivities.

“Don’t call me. Call King Momo until Ash Wednesday comes,” Mayor Eduardo Paes, wearing shorts and a Panama hat, told Carnival revelers as drummers and veteran members of local samba schools celebrated and sang traditional songs. “You should come for this guy. He's going to be in charge of the whole thing.”

Momo's tenure is symbolic of society being turned upside down during Carnival. His role is inspired by Greek mythology. Momus is the personification of satire, mockery and irreverence.

This year’s Momo is 28-year-old Kaio Mackenzie, from the working-class Mangueira community. Rio’s Carnival queen and princesses joined him, dancing to samba music as they held the city key aloft and confetti poured down upon them.

Some street parties have already been sweeping through Rio’s streets in the lead-up to Carnival, but the five-day celebrations will see almost city-authorized 500 bashes in the city. There are dozens more informal parties roving about.

On Friday afternoon, one of Rio's most traditional street parties, Carmelitas, took hold in the hilltop Santa Teresa neighborhood. It was founded in 1990 and many of its revelers come out dressed as nuns and priests of the region's Carmelites Convent.

Some in the street party paid tributes to Pope Francis, who is hospitalized in Rome. Earlier, the Vatican said the pontiff had a bronchial spasm and his prognosis remains guarded.

The city's 12 top-flight samba schools will present their Carnival parades at the city's Sambadrome between Sunday and Tuesday.

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