Kristen Stewart's Controversial Footwear Doesn't Involve Crocs or Birkenstocks

Say what you will about celeb-beloved Birkenstocks and the comfortable-but-divisive Crocs, the one shoe controversy that hangs over society is whether or not house slippers belong in the house — and only in the house. Kristen Stewart stepped out and showed the world where she stands on the inside-only shoes divide, wearing a pair of fuzzy happy face slippers in a decidedly outdoor space.

Stewart's slippers were black with classic yellow happy faces and she paired the very comfortable-looking footwear with socks, ripped jeans, and a black bomber jacket. While it was definitely a relaxed outfit, it wasn't quite loungewear, which is what most people would pair with laid-back shoes. She finished her look with her new go-to padlock necklace and sunglasses.

Stewart is not alone in declaring house slippers as actual footwear. Justin Bieber went through a phase where he wore complimentary white hotel slippers out in the wild — and even went as far as releasing his own $5 version at his label, Drew. And while the celebrity set can't seem to tear themselves away from a fuzzy Ugg slipper, slides and other house shoes are go-tos for names like Kendall Jenner, Olivia Wilde, and Megan Fox.

Stewart's slippers may appear to fall on one side of the inside/outside spectrum, but other choices seem to skirt the line, including Birkenstocks that work in and out as well as moccasins and clogs, which don't look like they're exclusively for the outside world.

Of course, even though they appear to be multi-purpose doesn't mean that they should be. A New York Times story found that "bacteria like E. coli were extremely common on the outside of shoes," so it's probably best to slip out of any kicks when you get home and slide into clean, indoor-only footwear.