1.5 ?! Am I missing something here ?

This was a fun light-hearted little movie with a good cast and 1.5 is a grade that one could use to rate something made by Adam Sandler or Sasha Cohen (or 0.5 more likely). So what gives ? Is it because of the Hiltons being in it ? I see that more than 400 people have voted, and I sincerely doubt that they've all actually seen the movie. Please, don't bash the movie just because you hate the Hiltons!