According to Rom Coms, All Women Are Psycho

I'm not going to get into whether women are competitive or not, that's a whole other can of worms. 

The point is that chick flick catfight movies like Bride Wars or, to a lesser degree, My Best Friend's Wedding, are banking on the fact that female audiences are going to cheer for the catfighters in the movie.

And whether you think women are catty bitches or not, this makes no sense. Non-competitive women would obviously be unable to identify at all, and most competitive backstabbing women still have enough social awareness to know it's not something to be proud of, and would cringe at having their worst traits magnified on the big screen.

That probably explains why Bride Wars saw a dramatic dropoff due to bad word of mouth after an already-weak opening weekend, since its entire basis was that best friends will turn on each other in an instant if some stupid female treasure like their "perfect wedding" is threatened in any way. 

Strangely, women did not flock to the movie shouting, "That's me! That's my life! It's funny because it's true!"