Last updated at 12:20

Beyonce sings national anthem for Obama ceremony

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Watch Beyonce's powerful performance

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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Watch Barack and Michelle dance

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.