More Than 400 Strangers Show Up to Minnesota Girl's Birthday Party After Facebook Invite Goes Viral

Mackenzie's mother originally invited 10 girls, but none of them RSVP'd.

“I originally invited 10 girls three weeks prior, but we got two cancellations and the other girls’ moms didn’t RSVP at all,” said Moretter, 38. “It’s happened to her on previous birthdays where she would end up sitting alone with family. I didn’t want it to happen to my daughter again this year.”