Clergy dance in Rio
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'Flash mob' dances for Pope in Rio

Hundreds and thousands of people have performed a "flash mob" dance in Rio de Janeiro to celebrate the biggest-ever Roman Catholic World Youth Day.

Pope Francis is closing the event with a mass on Brazil's Copacabana beach.

Many of the pilgrims had slept on the beach after attending an all-night vigil, which the Pope also led.

Sunday's ceremony marks the end of his first foreign trip since becoming pontiff in March.

Go to next video: Why camp on Copacabana?