Have you heard of Boo The Dog? Probably. He is the most popular dog on the internet. He has officially been named the world’s cutest dog. He is an 8 year-old Pomeranian who is most famous for his awesome style and massive head of hair. He became an internet sensation when he was about 5 years old. Several books have been published about him and a series of t-shirts, paper dolls, stuffed animals and toys have been made. He is definitely an international star.