See Why 300 Strangers Attended This 10-Year-Old's Birthday Party

For Mackenzie Moretter's 10th birthday, her mom planned a party for her daughter and some friends. But days before the big day, the birthday girl's mom, Jenny Moretter, informed her that everyone had either canceled or not replied at all. Devastated by the idea of disappointing her daughter, the Minnesota mom posted a note on Facebook asking people in her circle to stop by the party to just say happy birthday. She thought a few people might come. But what she got instead was an overwhelming community response that left the family speechless.

Twelve hours after she posted her message, the community sprung into action. More than 300 people showed up for a birthday party picnic that included donated food from Sam's Club and Mr. Pig Stuff Barbecue, an actress dressed as Elsa from Frozen, and a special visit from Minnesota Vikings player Charles Johnson and his family.

Mackenzie suffers from a rare genetic disorder called Sotos syndrome. It causes gigantism, meaning she grows at a faster pace than other girls her age, so it's been hard for her to make friends at school.

The outpouring of support truly brightened her day. "I have a hard time making friends in school, but thanks to all of you . . . my voice was heard," Mackenzie told her birthday guests. "I love you all."

But in the end, it's Mackenzie who may have inspired her community. A spokesperson from the mayor's office, who proclaimed Saturday Mackenzie Moretter Day, thanked the birthday girl for teaching the town a valuable lesson. "Thank you for reminding us how we should treat each other every day," she said.

Mackenzie's t-shirt on the big day said it all: