Sunset,
I've been doing some research and it looks like you found another long-lost Equestrian artifact: The Time Twirler.
I don't know how it found its way into your world but when activated it has the power to loop time. What you're experiencing isn't simply magic run amok or a wish gone awry, somepony is using the time twirler to cause this.
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Thanks for the info, Twi! We initially thought it was the Sirens that were using the time twirler but apparently, they were stuck in the loop too since they're Equestrians like me and it turns out the ones who were using it were my idols because they wanted to erase imperfections so fans would love them.
Pinkie and I broke the time twirler and taught them how imperfections are what fans would like. Eventually, they got us to play in their concert! Oh, and I told Rainbow Dash to record it.
https://www.youtube.com/watch?v=8YljRPUCSr4
Thanks,
Sunset
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The alarm from Sunset's phone woke both Sunset and Pinkie up from their sleep, noticing how they had stopped the time loop. The two of them went outside to see their friends having pancakes for breakfast and Sunset ducking away from Rainbow's wooden board.
''Get your own chicken coop~'' Applejack started before getting squirted at by Fluttershy spitting orange juice at her and laughing. Sunset felt a twinge as her eye twitched but Pinkie placed a hand on her shoulder and that was enough to know that the time loop had been broken.
Pinkie gave out a big gasp. ''What do you call a post crush fan with three—''
''Hey, Pinkie Pie?'' said Rainbow Dash from behind. ''Post Crush's concert was yesterday.''
Pinkie looked at Sunset. ''And you saw us, right? Right?!''
Rainbow's neck inched slightly backward. ''Err, yeah. You asked me to record it. Why are you acting super extra Pinkie Pie today?''
''Oh, no reason.'' Pinkie started admiring her nails before giving a wink to Sunset who returned it back.
''Okay...'' Rainbow rubbed her neck. ''Well, I would like to spend the rest of being here doing something exotic with you, Pinkie Pie.''
Pinkie's eyes twinkled. ''Really?''
''Yes, really.'' Rainbow moved away slightly. She took Pinkie's hand and the two of them went on their way.
Rainbow caught up with Pinkie with her super-fast speed as Pinkie went from station to station. First, they arrived at the cotton candy stand then played at the arcade then ate churros then gave some churros to their idols, and then finally stopped on top of the hill where they could see everything from up there.
''That sure was a day, huh, Pinkie?'' Rainbow asked her as she laid comfortingly on the grass, the sky becoming darker and stars peeking through.
''Uh-huh!'' Pinkie conceded. ''That was a lotta fun!''
''Heh. And it's been a long time since we've hung out like this, don't you think?''
''Dashie?''
Rainbow's eyes oozed as she stared at Pinkie tipsily. ''Hm?''
Pinkie moved away from a little. ''...Are you okay?''
''Never better!'' Rainbow replied, puckering her lips as she closed her eyes.
Pinkie's neck inched slightly backward until she jumped away causing Rainbow's eyes to snap back open.
''Woah.'' Rainbow stared dumbfoundedly. ''I didn't know what I was thinking. Sorry, Pink.''
''I-It's okay,'' Pinkie slowly said, sitting back down. ''Though, did you mean to do that?''
''What? This?'' She briefly puckered her lips, then rubbed her neck. ''Uh, maybe? I don't know. I mean you're really pretty and you can handle my energy, I can handle your energy...''
Pinkie looked down at the grass. ''You like me?''
''Well, 'course I do! You're my friend, Pinkie.''
''N-No. I mean do you like me the way you liked Applejack?''
Rainbow's eyes darted back and forth. ''I, uh...''
''It's okay if you don't,'' Pinkie said, nodding softly.
Rainbow Dash groaned, she wasn't good with words so she figured she only needed to act it out, and so she pulled Pinkie Pie to face her way as their lips made a connection. The latter's eyes widened once they met, the former's arm draping across her back as the wind swept past them and the moon shone over them.
They pulled away for a moment just to look into each other's eyes, to see if Pinkie liked it and to see if Rainbow wasn't lying.
Once they found out, they brought each other back into bliss as everyone else was too having the exotic time of their lives below the hill.