Watch One Direction perform "Best Song Ever" on America's Got Talent, where the 1D guys gave fans a special behind-the-scenes look at their new movie, 'This Is Us.' Video clip of "Best Song Ever" performance and interview. Watch the One Direction America's Got Talent performance now!
One Direction pre-recorded the performance of "Best Song Ever" before heading back across the pond.
As always, the 1D guys sounded fantastic, as the crowd was seen singing along, jumping, foaming at the mouth, crying, etc.
Harry noted, "It's our first time on this show, so it's very exciting."
The guys also showed a behind-the-scenes clip from their new movie This Is Us, as Harry noted, "I think this is a great chance for the fans to see what they want to see."
Zayn noted "There's plenty of topless scenes though."
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Gallery | One Direction: 'This Is Us'