Forget Christmas presents for a moment - Rovio has a whole host of birthday gifts just waiting for you today.

To celebrate Angry Birds's second birthday, the Finnish developer has updated its high-flying game with 15 new levels.

Guess what Rovio's called this anniversary chapter? Go on.

Yep, Birdday Party. Groan.

Quick as a flash, we - with some assistance from the nice folks over at AngryBirdsNest - have uploaded a series of videos to help you overcome the Birdday Party blues.

Many thanks, chaps.

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Want more? Check out our 18 other Angry Birds tips, guides and walkthroughs!