It's been a while since we've seen One Direction in their touring outfits, but now that the boys have skipped across the seas to join Big Time Rush on tour, the red, white and blue togs have come back out - and so have the intense faces.
(Further reading: The Intense Tour Faces Of Louis Tomlinson)
One Direction opened up for Big Time Rush at The Air Canada theatre in Toronto, and Louis wasn't the only one getting his scrunch on.
Click next to see our pick of the snaps of the other boys, and a bit more from Louis and Harry. Hurrah!
We imagine this might be about as intense as Liam Payne gets.... although who knows what happens to his face during his two minutes of glory.
Niall's too happy to have an intense scrunch going on. He loves life too much to squint at it.
Deep in thought.
"Hmmm.... did I turn off the oven..."
The boys headed down to Chicago on their foreign travels to perform an acoustic version of What Makes You Beautiful and answer questions from fans at KISS FM.