Selena Gomez, Postcard on the Run, and TUAW have teamed up for an awesome promotion for all our readers, as well as the chance to win some pretty sweet prizes to boot.
Postcard on the Run is an iOS and Android app that allows you to bring a physical touch to your digital memories by letting you turn any image on your iOS device into a physical postcard that can be mailed by the postal service to anyone, anywhere in the world. Besides being a great app,
