One Direction were ''in pain'' filming their 'Kiss You' video.

The group - formed of Niall Horan, Harry Styles, Zayn Malik and Liam Payne - hired filmmaker Vaughan Arnell to direct the project and after a shooting a difficult scene pretending to ski, the director was aware the boys were suffering from the mechanical techniques used.

He explained: ''The boys were in so much pain when we did the skiing scene because basically we had to get ski boots, drill them down into these little trollies that were pulled by ropes, it was all human and mechanical.

''At the end of it, I really felt for them. We cleared about three or four takes because their shins were getting bashed and split.''

Vaughan, who describes the track as ''60's beach'' music, took inspiration for the video from films and artists of that era - choosing late rock'n'roll legend Elvis Presley's 'Blue Hawaii' for one particular scene where the boys strip down to swimming shorts.

Speaking about the boys' antics on set, he added to MTV News: ''They said they would only [go shirtless] if I wore board shorts and did it with them. But I'm quite fat and quite lardy and have breasts and I was so nervous they were going to make me take my clothes off and do it with them, but thank god I talked them out of it.

''You get this feeling the minute they start to sing or the minute they start to perform, they are giving each other little looks. Maybe Harry might tweak somebody's nipples or something like that and the whole energy starts to build up.''