Sometimes duty calls!

Kendall Jenner and Gigi Hadid worked the runway for Moschino during Milan fashion week yesterday, and the reality star-turned-supermodel got the unfortunate job of wearing the box hat!

This outfit doesn't really showcase Kim K's little sis' amazing figure, but we still knows what's underneath that hideous ensemble. She recently revealed her fitness tips and tricks, and she's got to be the only person on the planet that actually likes doing sit-ups!

"My abs are my favourite thing to work out. I love it when my trainer, Gunnar Peterson, kills my abs. The next day it even hurts to laugh. That's how I know I'm doing the exercises right!" she told Hello! magazine. "Sometimes when I'm watching TV, I think to myself, 'I should be doing crunches and sit ups right now.' Then I get off the couch and do it," she added.

It's a tough job but someone's gotta do it!