One Direction are heading out on their first ever stadium tour, so to celebrate we've been looking at the things that could happen when Harry, Niall, Louis, Liam and Zayn take to the stage at their biggest ever shows next year.
One Direction – 'Best Song Ever' (Official Video)
Watch Harry, Niall, Liam, Zayn and Louis undergo huge transformations for the first single from their new album.
One Direction have released the official video to their brand new single 'Best Song Ever'.
The song is the first to be taken from their third studio album and the follow up to 2012's 'Up All Night'.
The promo sees the group portraying different characters, such as studio executives, a choreographer and Zayn making a huge change as he transforms into a woman.
Harry also swaps his trademark long hair for a short side parting and turns uber-geek to play Marcel the marketing boss.
'Best Song Ever' is available to download right now with the new album following later in the year.