You can read more about the epic Angry Birds party preparations here. And here. Also here. And did I mention here? I told you it was epic!
Also, please start humming "Sunrise, Sunset" while perusing the following photos:
5th birthday: http://mind-flush.blogspot.com/2010/05/thank-goodness-rain-held-off.html
4th birthday: http://mind-flush.blogspot.com/2009/05/whew.html
3rd birthday: http://mind-flush.blogspot.com/2008/05/more-partying.html
2nd birthday: http://mind-flush.blogspot.com/2007/05/taking-advantage-of-dsl-birthday-pics.html
1st birthday: http://video.google.com/videoplay?docid=9047701054124759441#