One day, Diamond Tiara was walking down the street, just, you know, doing pony stuff and telling blank flanks to stop being so lame, when suddenly, completely out of the blue, she reflected on how awesome she was. "Yeah, I really am awesome," she said. "Without me spurring them on, half the blank flanks in our class probably wouldn't have been so desperate to get their cutie marks, and wouldn't have tried doing loads of cool new stuff, so wouldn't have found their very special talents."

"That's a very good point," said Princess Celestia, who was there, by the way. "I was just on my way here to banish you to Tartarus, but now I see that you and your friend really are awesome, so I'm not going to do that any more."

Diamond Tiara started fangirling. "A princess! A princess! A princess! A princess! A princess! A princess! A princess! A princess! A princess! A princess! A princess! A princess!"

Celestia looked at Silverspoon, who was there too, by the way, and then back at Diamond Tiara. "I don't suppose you two might want to have a threesome?"

Silverspoon nodded her head. "Ewwww!" whined Diamond Tiara, "you're like thousands of years old, and I'm like 10 or something." Silverspoon hung her head with disappointment.

"OK, just checking. Forget I mentioned it," said Celestia, remembering that that really wasn't where this story was supposed to be going anyway. "Anyway, what I was thinking was we've got, like, 4 alicorn princesses in Equestrium, and I was thinking like 4... 4... 4 is so random. Why 4? Wouldn't 5 be better? 5 is prime, like Optimus Prime. What if we ever needed to have a vote? Wouldn't it be better to have an odd number? I mean, we never need to have a vote because the other princesses are my bitches, but you know, like what if? So I was thinking maybe you might want to be an alicorn princess?"

"What took you so long?" asked Diamond Tiara.

"What about me?" asked Silverspoon.

"Sorry, you're awesome too, but Diamond Tiara's just a bit more awesome. She's like 20% awesomer," said Celestia.

"I know," said Silverspoon sadly, hanging her head in shame.

"I've already got the tiara," said Diamond Tiara.

"ikr?" said Celestia.

So Celestia waved her magic horn and some magic stuff came out of it and went into Diamond Tiara's back and she grew wings and Celestia was like "oh, you're an alicorn," and Diamond Tiara was like "oh, but I don't have a horn," and Celestia was like "sorry, I forgot you weren't a unicorn to begin with," and Diamond Tiara was like "ikr? I forget myself sometimes," and then Celestia was like "ok, I'll give you the horn," and she sniggered because that sounded rude, and then she gave Diamond Tiara the horn, and Silverspoon was well jel.

And that is how Diamond Tiara became an alicorn princess.