Hey Cupcake! is an Austin business that started in this little Airstream trailer down in South Austin. Their cupcakes are excellent. They had so much success that they now have a real brick & mortar location on the North side of town. They also started a massive wave of trailer-based businesses in Austin: crepes, tacos, you name it and you can probably find a trailer selling it around here. The cool thing is that they are all good! Plus, it's just another thing that adds to the cool, funky vibe of this town.