When it comes to internet-famous pets, Marnie the Dog is one of the coolest around. Aside from having a whopping 1.9 million followers, this Shih Tzu rescue is actually pretty popular with some of your favorite celebrities. Of course, what's not to love, with her signature floppy tongue and her lovable personality? From pop stars to actors, and all that in between, it's safe to say that this pup runs with a pretty cool crowd. See some of her best celebrity encounters!