Uh, what's up with this chica's leg--or is it legs? That's what Twitter is wondering after a woman went viral over the weekend thanks to an optical-illusion pic. "Yeah, I just combined vertical and horizontal stripes," Twitter user @milanoysl wrote on Friday along with a full-body mirror selfie that shows her sporting a bulky striped sweatshirt atop a pair of track pants with a single stripe down the side. Since the stripe is the same color as her bathroom floor, it makes it look like she has two super-skinny, black-clad legs. Twitter went so nuts trying to figure out the pic that @milanoysl had to write in a followup tweet, "No I don't look like this," along with an obviously Photoshopped pic of her with two twiggy legs. [Cosmo]