Now, we've got two new animals that have joined these rankings - Haggis the pygmy hippo and Ava the Tiger. Here's a look at these cutie animals. Ava, a three-year-old golden tabby tiger ...

From Moo Deng and Ava the Tiger to Nala the Cat, the latest sensation capturing hearts online is Haggis the Hippo. Follow Moo Deng from a zoo in Thailand who has taken the internet by storm.