The Kardashians are famous for not smiling on the red carpet — so much so that their smoldering frowns are as much a part of their brand as duck lips or contouring. However, it didn't use to always be like that. The sisters couldn't stop smiling when they made their reality TV debut, beaming widely to paparazzi as they showed up to various D-list events. However, those days are long over, and Kim Kardashian couldn't care less what you think about it.

"Before I was always smiling, and so into being out and about,” she told C Magazine in 2015 about being pregnant with North West. “After I had the baby, I was like, ‘These are the same people that made fun of me and posted the stories that were so awful, calling me fat for something I couldn’t control. I don’t want to smile for them. I don’t want to be out.' Even if I was more confident, I just didn’t feel like being that girl who was going to be smiling for every photo."

Kylie Jenner has also hopped on the "no smile" bandwagon, prompting HuffPost to ponder back in 2016, "Do you know what Kylie Jenner’s teeth look like?" And, to be honest, as we were reading the article we stopped, blinked, and realized, "Wow, we don't know what Kylie's teeth look like!"

And more power to Kim and Kylie, because women shouldn't feel pressured to have to smile for everybody. However, we can't help but wonder what those frowns would look like if we could turn them upside down. And thanks to technology, we managed to do exactly that. We used FaceApp to turn those famous Kardashian scowls into grins, and the results are a tad scary, yet equally mesmerizing. Scroll down to see what we got ourselves into.