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Pop superstar Beyonce sang for US President Barack Obama on Monday at a special ceremony to mark the start of his second stint in charge of the country.
She performed the US national anthem in front of a crowd of more than 800,000 people in Washington.
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In the evening the president attended a party called the inauguration ball with his wife Michelle.
They danced on stage together in front of the crowd who took lots of pictures on their smartphones.
