Someone explain Pinkamena to me.

From what i recall, it came from the episode "Party of one"
Pinkie pie turned "depressed" or "insane" when none of her friends would come to her party, she thinks that her friends don't want to be her friends anymore.
The fandom took it a step farther, adding more.... insanity.
The "Cupcakes" Fan fiction is about pinkamena, quite a weird, and disturbing read.
Wouldn't recommend it.