One Direction perform 'Best Song Ever' on 'America's Got Talent' - video

One Direction performed their latest single 'Best Song Ever' on America's Got Talent.

The group took to the stage at New York's Radio City Music Hall during Wednesday's (August 28) semi-final results show.

Host Nick Cannon asked the group about their behind-the-scenes movie This Is Us.

"I think it's a great chance for the fans to see what they want to see of us backstage and to see what happens behind closed doors," Harry Styles said.

Zayn Malik added: "There's plenty of topless scenes," to an uproar of screaming fans in the audience.

One Direction's debut movie This Is Us opens in UK cinemas today (August 29) and in the US the day after (August 30).

This Is Us - premiere gallery:

One Direction at the world premiere of This Is Us at the Empire Leicester Square, London.

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Copyright: Ian West/PA Wire/Press Association Images

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