Instead of waiting, this time Celestia got out of bed and headed down the palace corridors in a futile attempt to prove some understandable mortal cause of her troubles. She went directly to her sister’s bedroom and knocked on the door, probably waking her poor sister up. After the knock she opened the door to her sister’s unlit bedchamber.
“Luna, this is amusing, but I think it should--” Celestia paused her train of thought as she looked into the room.
Celestia had only average night vision. She didn't have the perfect sight in darkness her sister, Princess of the Night, did. Her eyes could still, however, make out broad shades in the mostly dark room. Such as, to pick a completely random example, telling the difference between a alicorn with a black coat and one with a bright pink one.
"Velcome, mine dearest sister. Vhat brings thou to mine bedchambers this late into mine glorious night?" The figure rose from the bed and gracefully moved towards the open door. Until one of her legs whacked into a heavy chest. Then the figure stumbled gracefully and muttered impolite words under her breath.
Princess Celestia honestly had no idea how to respond to that. So she backed up until she was in the hallway and closed the door to her sister's bedroom.
"I am the spirit of Hearth's Warming Eve present. Ooooo~"
"Luna, you aren't even using a different voice for each spirit."
"I've come to show you how your selfishness affects your subjects," the impossible to identify spirit said in the bad Trottingham accent it had been using the entire time. Honest. “How little they have when you enjoy your palace and servants.”
"Oooo~ Witness this vision of other ponies enjoying the holiday without your wealth or power."
As the unknown spirit spoke, the darkness of the night flowed all around Celestia, sweeping her away from the hallway outside of her sister’s room via unexplainable cosmic forces. She found herself floating over a small town, one of many in Equestria, all of them more or less the same. A random town indistinguishable from any of the--
"You teleported us. That's Ponyville." Celestia, of course, knew exactly which town it was.
"Look how your subjects enjoy the holiday with only the barest necessities of survival." The mysterious and very clever unknown spirit pointed at a unicorn trotting along in the village below.
"You mean Rarity, a small business owner who regularly has nobility for clients?"
"O-of course not! See the lonely pegasus who lives all alone..."
"Oh yes, Rainbow Dash. Weather team leader, award winning flier, and the subject of devoted admiration from at least five fan clubs across Equestria and the buffalo lands."
"Grr, witness a poor student separated from her family," The spirit, perfectly composed and calm and unknown.
"Ah, yes, Twilight Sparkle. Protege to the ruler of the kingdom, once the third most powerful unicorn alive, and now the fourth alicorn princess in all the world. Look, she's headed to her immense crystal castle that looms over the town--"
"Fine! We must return, for a spirit's time is short."
"Look! There is Applejack, the poor farmer whose apples are sold in every city in the kingdom. Looks like her happy and well-fed family are coming into town to spend the holiday with their close personal friend, the recently ascended alicorn princess!" Celesta exclaimed gleefully as she pointed with one hoof.
She found herself wrapped in darkness and deposited back to her bed, face first.
"One more spirit will visit you this night," a voice from nowhere said. It was a sign of Princess Celestia's harrowing experiences that she imagined hearing some pony sticking out their tongue and blowing a raspberry at her. The unknown spirit, of course, had already vanished as mysteriously as it had appeared.