Princess Stupid Jerk McButt is a big dumb princess who has social events with only a very small group of ponies and refuses to invite her new friend to them even though her new friend is very nice and apologized for the time she enslaved the town. No one likes her because of this, except her other dumb friends, and her one not-as-dumb friend.
I've been told to thank Too Manestream for the cover picture. Whatever that means.