Here's a commercial starring Grumpy Cat (aka Tardar Sauce) for Honey Nut Cheerios. An associate director of marketing at General Mills called it "a middle-aged cereal," and so to get hip with the meme-loving millennials, they brought in a grumpy-looking cat that's been trotted out to all kinds of places, even SXSW. Free Grumpy Cat.
[YouTube via Mediabistro]