Watch One Direction performing Best Song Ever on AGT show

In the U.S. tour for the release of their documentary film This Is Us, the One Direction stopped by the NBC’s TV Show America's Got Talent on Wednesday (28) and sang their latest hit "Best Song Ever".

The quintet also told host Nick Cannon what fans should expect from the film. "I think it's a great way for fans to see what they want to see, which is what happens behind the scenes, behind closed doors and stuff," said Harry. Zayn also added saying that will have many scenes with shirtless boys.

The film This Is Us opens in the UK theaters today, August 30, 2013 and the group will tour in Australasia for Take Me Home Tour this September.

One Direction, Best Song Ever, NBC, AGT show