Did you see it? It was pretty quick. Everyone's favorite game got a little Super Bowl glory. Hidden in the Rio film promo was a clue to unlock a secret football shaped golden egg. Once you beat that level you can enter to win a trip to the film's premiere.
Here's how to do it:
First you need to be at least able to access the level 5. Ham 'Em High.
Once there you want to access level 13-12.
Fire that first yellow bird. You don't need him.
Take the next bird and fire him backwards. Release his egg bomb right before he goes off screen. You got to be pretty quick.
You will then see the football shaped golden egg, in the golden egg menu.
From there you can play the secret level!