Grumpy Cat's official YouTube channel has almost 6.4 million views and more than 12,000 subscribers. "We have sold over 17,000 Christmas cards and we are donating a portion of the proceeds to ...

Grumpy Cat appears at Lifetime's Grumpy Cat's Worst Christmas Ever event at Macy's Union Square on November 21, 2014 in San Francisco, California. (Steve Jennings/Getty Images For Civic Entertain) ...

Grumpy Cat starred in her own movie and had numerous guest spots on TV. In 2014, she starred in the LifeTime movie “Grumpy Cat’s Worst Christmas Ever.” ...