Football: It's a uniquely American phenomenon, from the game itself to the diehard fans. And this Sunday millions of Americans will flock to sports bars and house parties across the country to watch the Green Bay Packers and Pittsburgh Steelers vie for NFL gold at Super Bowl XLV.

But the game itself isn't the only reason why the Super Bowl is consistently the most-watched television event of the year, with roughly 100 million viewers. Nor is it just because people love an excuse to get trashed on a Sunday (though as a general rule, that's almost always a good enough reason to do anything).

It's also about the commercials -- especially those featuring celebrities -- which have become an essential part of the game day tradition, making the Super Bowl a must-see event, even for those "fans" who think football is just a fancy word for soccer. So even if you're not from Green Bay (which no one is) or Pittsburgh (which no one admits to), you've still got a reason to tune in -- and advertisers are banking on you doing just that.

After the jump, check out PopEater's 10 favorite celebrity Super Bowl commercials!