Whether they love it or hate it, we can't resist dressing our pets up in sweaters, costumes, party hats, you name it. So, when Twitter decided it was National Dress up Your Pet Day, of course everyone was on board. Us? We're just happy to scroll through, pick out our favorites and share them here for all to relish in the cute. Gather up your fur babies, pick out their best frocks and then vote the best-dressed pets to the top!