(AP) — In this undated photo provided by Nestle Purina PetCare is Grumpy Cat.
It probably won't affect her famous mood, but Grumpy Cat now has an endorsement deal. The St. Louis-based company announced Tuesday, Sept. 17, 2013, the frown-faced Internet sensation, real name Tardar Sauce, is now the "spokescat" for a Friskies brand of cat food. (AP Photo/Nestle Purina PetCare)