COPENHAGEN, Oct. 2 (Xinhua) -- The four candidate cities finished here on Friday their final representations at the 121st Session of the International Olympic Committee (IOC) that picks the 2016 Olympics host.

    Chicago was the first to make its final presentation, during which both U.S. President Barack Obama and first lady Michelle made passionate speeches to woo for support.

    "I came here today as a passionate supporter" of the Olympics and "a strong believer of the movement it represents," Obama said to the 100 or so IOC members.

    The IOC session will select the host city among Chicago, Rio de Janeiro, Tokyo and Madrid later Friday.

    "I urge you to choose Chicago, and I urge you to choose America," Obama appealed. "If you do, we walk this path together ... Chicago will make the world proud."

    Obama originally decided to stay at home to push forward his health care plan but later carved out several hours from his tight schedule to come to Copenhagen to woo support for his claimed hometown, Chicago.

    Japanese Prime Minister Yukio Hatoyama made it a mission as to come to the Danish capital to support Tokyo, stressing environmental sustainability in hosting the Olympic Games.

    "Tolyo is well placed to serve the future model of the Olympic movement of public security and environmental sustainability," he told the IOC voters.

    "I have made it a mission to come to Copenhagen to express my strong support to Tokyo as the host city for the 2016 Olympic and Paralympic Games," he said.

    The Japanese prime minister expressed his support to the effort of the IOC in the development of culture, sports and environment agenda as the essential missions of the Olympic Movement, saying that this was the reason that he recommended Tokyo for the 2016 Games.

    "We will provide every resource and service needed to ensure a lasting legacy."

    The Rio bid team played economy and geography cards in its final presentation in an attempt to win.

    In a passionate speech, Brazilian President Luiz Inacio Lula da Silva said to the members of the IOC voters that his country is experiencing a "magical moment" of economic development.

    Silva, known as Lula, made a strong urge to the voters to choose Rio as the host of a Games.

    "I ask for your support and vision. Rio is ready. If you give us this chance, you will not regret," he appealed, using short sentences.

    He also stressed that Brazil and South America have never hosted an Olympic Games.

    After praising the IOC for its contributions in modernizing the Olympic Games, introducing new sports and new technology, Lula said that "the opportunity is to expand the Olympic Games to new continents."

    Madrid brought up the rear in the presentation event.

    The bid team of Madrid stressed that the Spanish city has paid more attention to human touch rather than infrastructure construction.

    Antonio Samaranch, an IOC member, opened the city's final presentation.

    "We have kept communicated for the past three years that we put people before infrastructure," said Samaranch Jr., whose father Samaranch Sr is also present on the occasion to drum up support to Madrid.

    This is the third time and consecutive second time that Madrid has bid for hosting an Olympic Games.

    "Sports make us all equal" is what the Madrid bidders believe.

    Several representatives of athletes said that they believed that Madrid could host an excellent Olympic Games and would make the city a better place for the citizens and people of the world.

    "I believe. We Believe,," they ended their appeals to the IOC members.

    Samaranch, former IOC president, said that as a 89-year-old man, he was approaching to the end of his life and "asks" his former colleagues to "consider" to let Madrid a chance to host the Games in 2016.

    Among the Madrid bidding team are Spanish King Juan Carlos, Queen Sofia, Prime Minister Jose Luis Rodriguez Zapatero and a string of sports stars.

    The media here believe that Madrid has little chance to win the race as it is believed that IOC members would not give the chance of another European city to host the events right after London, which will host the 2012 Olympic Games.

    Rio is expected to have a tight race with Chicago in the vote before IOC President Jacques Rogge announced the winner.

    As many as 106 IOC members as of September 2009, but only 97 of them could vote from beginning to end as nationals of the countries of candidate cities are not allowed to vote unless their candidates are eliminated.

    Rogge decided not to vote, while South Korea's Kun Hee Lee was suspended.