Taylor Swift appeared to be struggling to breathe during a concert in Rio de Janeiro, Brazil, on Friday in the middle of a heatwave.

The star ended up postponing the concert she was due to perform on Saturday, after a fan died shortly before Friday's show.

Brazil is experiencing an unprecedented heatwave, triggering health alerts.

Authorities there warned of the danger to life as it recorded a heat index, which combines temperature with humidity, of 59.3C (138.7F) on Friday followed by 59.7C (139.5F) on Saturday.

Other videos taken at the concert show Swift throwing a bottle of water into the crowd while singing All Too Well in the stifling heat.

The sound from this video has been removed for copyright reasons.

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