Heh, I was watching this amv on YouTube with jack and the song once upon a December from Anastasia, and this is what my mind cooked up, so enjoy.

"Damn that kid, where is he?" Bunnymund wondered aloud as he searched through the snow covered forest. All of the guardians were supposed to meet up at North's, but Jack, being the rebellious teenager he is, never showed up. Bunnymund himself would have been fine with it, but Tooth and North had insisted he go fetch the winter spirit, while sandy just nodded his head in agreement. "Just wait till I get my hands on him, I swear to MIM that I'll-"Stopping abruptly, the Pooka perked one of his ears up and listened to the sounds around him. He could have sworn he heard Jack's voice, but was the boy singing? Picking up his pace he neared the spot where Jack's voice could be heard.

The sound led him to a small clearing in the forest, where a lake lay frozen (most likely courtesy of frost), there standing in the middle of it was Jack Frost himself. Bunnymund considered steeping onto the ice, and dragging Jack's Frosty butt back to the north pole, but right as he was about to place one of his giant paws on the frozen surface, something happened that almost made the Easter guardian scream out in shock. Ice in the form of humans, garbed in tuxedoes and fancy ball gowns, materialized seemingly out of nowhere. Bunnymund whipped his head towards Jack, who seemed to be oblivious to the world around him, and instead looked towards the human like ice sculptures with a sense of longing. Bunny watched in awe as the ice people began to dance, and Jack began singing once again.

Dancing bears

Painted wings

Things I almost remember,

And a song someone sings

Once upon a December

Bunnymund furrowed his furry eyebrows. Could the boy possibly be talking about a memory he had before he became a guardian?

Someone holds me safe and warm,

Horses prance through a silver storm,

Figures dancing gracefully,

Across my memory,

The Pooka felt his jaw go slack as the ice sculptures began to sing along with the melody. He know Jack could make moving figures made of ice, but to actually give them a voice of their own…even he had to admit it was remarkable. His attention was once again drawn towards jack as a ice figurine in the shape of a young girl, not much older than ten grabbed one of Jacks hands in an attempt to get him to dance with her. Jack smiled softly, and bowed. The girl in return, curtseyed, and the two began to dance.

Someone holds me safe and warm,

Horses prance through a silver storm,

Figures dancing gracefully,

Across my memory,

"Could Frostbite possible have been a noble when he was alive?" Bunnymund thought to himself. And if so, why was it that he wore such shabby clothing, and had manners that didn't much differ from modern day delinquents? The Jack he was seeing right now seemed like a different person. A person who had been trained in the art of nobility since the day he was born. Was this really Jack Frost?

Far away, long ago

Things I yearn to remember

And a song someone sings

Once upon a December

As the other figurines began to fade back into the lake, Jack and the little girl continued to dance. Finally after moment the dance came to a close, and the two bowed to each other once again. The little girl placed a kiss onto his cheek, and she too disappeared back into the ice.

And a song someone sings

Once upon a December

Swiftly and silently Bunnymund made his way back to the North Pole. He would get onto Jack about his absence another time, but for tonight, he would allow the young spirit to have time to himself one this one December night.