In the trailer for 'Neighbors,' Seth Rogen and Rose Byrne play parents of an infant daughter whose new neighbors are... 50 fraternity brothers, one of which is an often shirtless Zac Efron.

You know what that means? Parties and clashes!

One phone call to the cops upsets the natural order of things and leads to epic battles between the family and the brothers of the frat.

Efron plays the de facto leader who is shirtless… a lot! Can't beat that, especially when he's manning the grill.

If a shirtless Zac Efron isn't your thing, don't worry. There's plenty to giggle about in the trailer, especially the parts involving jacked airbags.

The movie hits the multiplex on May 9. What a way to kick off the summer movie season. The trailer definitely gives you something to look forward to.

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