One Direction have unveiled a new behind the scenes tour video to the public on YouTube.

The band are seen meeting pop princess Katy Perry in the clip, who can be heard calling Niall Horan "cute".

The British quintet have made America their second home this year, working a hectic touring and promotional schedule.

However, the video - entitled 'Access 1D Part 2: USA' - shows that their busy itinerary and global fame isn't quite getting to the lads yet, who appear in high spirits.

Zayn Malik and Harry Styles can been seen in the clip indulging in some high jinx fun as they film promo features and appear in photoshoots.