The members of boy band One Direction were put through their paces backstage before a show in Nashville, Tennessee on Thursday (20Jun13) as part of a Skype skit on U.S. Tv.

Pals Harry Styles, Zayn Malik and Liam Payne took on Niall Horan and Louis Tomlinson in a scavenger hunt during an appearance on Jimmy Kimmel Live!

The U.K. pop stars had to show off their American accent skills and appear on camera with toothpaste moustaches, but Styles won the contest for his team by disrobing.

Kimmel asked the boys to "come back wearing your underwear over your pants" and pop hunk Styles simply took his trousers off.

The singers later aired an exclusive teaser of their new movie This is Us on the show.