Jiff the Pomeranian, also known as Jiffpom, appeared in Katy Perry's Dark Horse video several years ago and now counts himself as the world's "most popular dog" with more than 30 million followers on social media. It's not just looks, he's a talented pup who has broken two Guinness World Records for the fastest 10m run on hind legs and 5m run on front paws. Jiffpom even has his own emoji line, Jiffmoji. An Australian news website estimated he earned A$17,500 ($12,100/£9,500) per Instagram post, while another source put his total net worth at $56 million (£44m). 

The most expensive dog breeds in the world