Rio de Janeiro residents celebrate as their city is announced as winner to host the 2016 Olympic Games.

COPENHAGEN — Like sweet, sultry samba music, Rio hit all the right notes.

Chicago had Barack Obama. Tokyo had $4 billion in the bank. Madrid had powerful friends. But none of that mattered. Rio de Janeiro had the enchanting story — of about 400 million sports-mad people on a giant untapped and vibrant continent yearning, hoping, that the Olympics finally might come to them.

And the International Olympic Committee was hooked.

Olympians, we’ll see you on Copacabana beach in 2016. Let Carnival begin.

On a chilly Danish evening of high drama, the IOC on Friday sent the games of the 31st Olympiad to Brazil’s bustling, fun-loving but crime-ridden city of beaches and mountains, romance and slums.

The IOC closed its eyes to the risks — the huge projected costs of the Rio Games, the concerns about how athletes will get around and where people will sleep — to focus on the reward of lighting the Olympic cauldron in one of the last corners of the globe yet to be bathed by its light.

“It is Brazil’s time,” said the country’s charismatic president, Luiz Inacio Lula da Silva.

Chicago was knocked out in the first round — in one of the most shocking defeats ever handed down by the committee of former Olympians, sports administrators, royals and other VIPs.

Bad blood between the committee and its U.S. branch — they’ve had flare-ups over revenue sharing and lucrative broadcasting rights — proved to be a note of discord. IOC members said the slap to Chicago was more directed at the U.S. Olympic Committee than to the Windy City itself.

The win was decisive: Rio beat Madrid by 66 votes to 32. Chicago got just 18 votes in the first round.

— From wire reports