Are you playing the free version of Angry Birds because you can't see yourself giving up a Washington to help birds slay pigs? We have good news: Angry Birds Seasons, the iteration where the birds and pigs duke it out in "different festive seasons around the world," is Apple's Free App of the Week. You have until next week to download it for free. After that you'll have to pay either 99 cents for the regular version, or $1.99 for the HD version.
Click here to download Angry Birds Seasons from the Apple App Store.