Grumpy-looking cat goes viral, cheers millions

Grumpy cat. The internet's grumpiest cat? #grumpy #cats #famouscats #c, Grumpy Cat

Meow!, Gregory Hays

Video: Remembering Grumpy Cat, owner of the face that launched a thousand memes

The Official Grumpy Cat - Ahhh I see a terrible celebration in my future with Purina and PetSmart. Any guess on what it may be? Go to PurinaFortunes.com to learn more. #ad #

Watching cute cat videos is instinctual and good for you

Meet Louis, the new grumpy cat who looks permanently angry

Angry cat' amasses huge social media following due to his seemingly permanent grumpy expression

Viral Star Grumpy Cat Passes Away, Is Memorialized In Memes - Tubefilter

IU study says cat videos reduce anxiety, boost energy