Need help identifying this ad

So I was watching Jonah Hex on blu-ray not too long ago. During the previews, an advertisement came on for some company. The ad was a series of b&w clips of various actors/actresses watching films in theaters. Some noteable actors were Matt Damon, Leonardo Decaprio, and others. There was a very cheerful tune playing during the ad. Does anyone know what company the ad was for/where I can find the ad/what the name of the song is playing during the ad? Any answers to any of these questions is greatly appreciated. Thanks!

-G.B.