26 minutes in the movie, we see Seth Rogen's butt from the side.

42 minutes in the minute, we see Dave Franco's ass as he is making love to a girl.

57 minutes in the movie, there are a bunch of extras naked.

In this movie, you can see Jason Segel naked a lot... through long and repeated scenes. One of his costars is Russell Brand that you will see in some of the screen shots, although Russell does not appear fully nude.