You'd think that belting out the hits and picking up a truckload of awards would have them pretty pooped, but instead of spending their time backstage having a power nap, they decided to draw some (terrible) pictures and blow in each other's faces instead.
Put to the test, the lads went up against each other to prove who was the most manly member of 1D.
First up came an art class, but if this is how they see each other, it might be time for Paul to take them on a group outing to visit the optician.
Did we mention that there's a really nice close up of their arses?
Next up came the most macho task of all; finding out who has the biggest puff.
For once we don't actually mean that in a pervy way either..
What do you think of all that then? Impressed with Liam and Harry's ability to hold their..breaths?