The guys tackle "What Makes U Useful" to the tune of "What Makes You Beautiful" and we never imagined learning so much about a vowel could be this much fun. The guys all sing the virtues of U and it's almost as fun watching the Sesame Street puppetry at work as it is seeing Harry, Zayn, Niall, Liam and Louis really hamming it up for the children's show.
Also, marvel at the hair situation here, as we know this was taped literally forever ago, as witnessed by Zayn and Harry's much shorter 'dos.
No doubt they're Sesame Street gig had to be a career highlight (seriously, what can't these guys do?), but we'll balance it with a seriously sweet surprise from 1D HQ today – an acoustic version of "Night Changes."