From the original source:
Forgot to take an old ad off Craigslist. Now I just mess with people.
When the CMO of Angry Birds developer Rovio was invited to an event at the Finnish Presidential Palace (because when you've created the most popular mobile game in history, you get to roll with presidents), his wife repped the company by wearing an Angry Birds dress. No word on whether they have blue, black, white, or pig versions.