(CNN) If the January blues hadn't already got to you... the world's cutest dog, Boo, has died of a broken heart. The Pomeranian Boo and his companion Buddy, who died last year, became internet sensations when their American owners started sharing pictures of their adorable antics. His death was confirmed in a post made by his owners to his 16 million Facebook followers . "Shortly after Buddy died, Boo showed signs of heart issues. We think his heart literally broke when Buddy left us," his owners wrote.

Source: CNN January 19, 2019 13:14 UTC