Was Lady Gaga's Rio concert really attended by 2.1m people?

BBC Verify looks at a claim from Rio de Janeiro officials that the pop star's beach gig drew huge numbers.

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The Lady Gaga concert was paid for by the seaside city in an attempt to revitalise its economy.

Fans reportedly travelled from all across the country to see the grandiose performance, which was expected to bring in more than $100m (£75m) to the local economy.

Rio officials heralded the 2.1 million attendance as a triumph.

However, careful analysis by the BBC Verify team and a crowd density expert reveal it is highly improbable the claims are accurate.