Today, for those of you living under a rock, is World Cat Day. But of course, every day is cat day on the Internet. In honor of our feline friends, and their uncanny ability to send Internet users into a state of euphoria simply by existing, we present nine of the looniest cat commercials ever made. Some of the entries come from Unruly Media's new list of the most-shared cat ads ever;  others are just some of our favorites. All of them are like catnip to the kitty-loving YouTube masses. Check out the gallery at the link below, and let us know your favorites.