Members of the public have been warned to plan their travel as Taylor Swift descends on Cardiff next week.
Thousands of her fans – known as Swifties – are expected to gather in the Welsh capital on Tuesday for the American singer’s Eras Tour.
Last week, the 34-year-old superstar took Edinburgh by storm.
Swift then performed in Liverpool on Thursday and will do two more concerts in the city on Friday and Saturday before arriving in Wales.
The UK leg of the tour will come to an end next week with performances at Wembley Stadium in London.
She will then go on to Ireland followed by a string of gigs in mainland Europe before further shows at Wembley in August.
Principality Stadium, best known as the home of Welsh rugby, will be transformed for the Cardiff event.
The council said it expects the M4 to be “very busy” due to the concert and has said the public should “plan ahead”.
The gates to the stadium are set to open at 4pm, but there will be a full road closure in the city centre from 12pm until midnight.
Cowbridge Road East, Castle Street and Duke Street will stay open until 3pm, the council confirmed.
A park and ride facility at Cardiff City Football Club will be in operation for those hoping to avoid congestion.
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Transport for Wales are set to provide extra capacity on routes in and out of Cardiff on Tuesday.
But trains are also expected to be very busy with passengers urged to allow plenty of time for their journey.
After the event, there will be separate queues on Central Square for all lines, while the queues for the South Wales Valleys services will be at the rear of the station.