The birthday of a mentally disabled 10-year-old girl in Minnesota was attended by more than 650 strangers. Mackenze Moretter's 10th birthday invitation was turned down by fourth grade classmates. Only cousin and neighbor said they would attend the party.

Mackenzie was born with Sotos syndrome, which is a genetic disorder that delays speech and learning. According to her mother, other kids don't like to socialize with her.

Her mother, Jenny Moretter, decided to make a heartbreaking plea on the social media. She took the plea to Facebook and asked other mothers to wish her a happy birthday online.

She did that just 12 hours to go before her planned party at her home in the city of Shakopee in Minnesota. The post wanted families with girls around Mackenzie's age to pop in to the party.

The post was picked up by Fox9.com and it quickly went viral. The people said they would attend her birthday at Shakopee Memorial Park.

People came with a 'Happy Birthday' banner, plenty of food, lots of presents and a Frozen-themed cake. Mackenze blew out the candles on her 10th birthday cake in front of about 300 strangers.

Shakopee Mayor Brad Tabke issued a proclamation and announced that April 18 would be Mackenzie Moretter Day. He gave the girl a signed certificate of the declaration.

Minnesota Vikings football player Charles Johnson also went to MacKenzie's birthday party. A woman dressed as Elsa from Frozen, Mackenzie's favorite character showed up and gave her blessings. Children she had never met before hugged her and gave her presents.

On the Facebook page followed by 1.4 million followers, Moretter wrote, "I'm overwhelmed with emotions, my heart has been touched by so many stories similar to mine or just people wishing her a Happy Birthday. I will never be able to thank you all enough for your kindness".