Pinkie Pie becomes an immortal Alicorn and ensures a paradise of endless Fun for all of Equestria?

It's already well known in show that Pinkie can be quite the determinator on making other people happy, (A Friend in Deed) and one of the few things that Pinkie Pie seems to hate is being alone (Party Of One), so she'd have an obvious motive to make everyone else join her immortal fun party. Also, she's so random in show you could easily believe her somehow getting Alicorn status by accident. (Chapter 1: Celestia is crushed while bravely defending Equestria, Pinkie Pie takes on her role while everyone else is calmly discussing what to do, make some sort of Pinkie Pie-Pink Sky=Sunrise reference, of COURSE, she had unexplainable powers from the very beginning, clearly this was MEANT to happen!)

It might take more than 10,000 words though. And if any pony could make Fun dramatic Pinkie Pie could. She makes fun serious business.