Angry Birds Facebook Officially Launches on  Valentine's Day.

Watch video of Angry Birds Facebook First Look.

From PCMAG:

The Facebook app is similar to the original mobile version, with the addition of social components, brand new power-ups, and exclusive new levels. The added social aspect allows players to compete with their Facebook friends for gold, silver, and bronze crowns in any level. Players can also brag about their scores on the social network and give their Facebook friends "mystery gifts" of power-ups.

The Facebook version includes four new power-ups, including "sling scope" (for better targeting), "king sling" (for more power and velocity), "super seeds" (to supersize your bird, turning it into a "pig popping giant"), and "birdquake" (to shake the battlefield and bring down pigs' defenses). Besides being gifted with power-ups, players can earn them through game play or purchase them.

In addition, there are exclusive levels designed for the Facebook app.

Angry Birds has been downloaded more than 700 million times since its release for Apple’s iOS in December 2009, and with Facebook’s 800 million users, it’s bound to hit 1 billion soon.