It's her party - and she'll invite everyone on Facebook if she wants to.
A 16-year-old girl in Germany ditched her own party after she forgot to set the privacy settings on the invitation and accidentally invited . well everybody.
The mistake began when the birthday girl, identified as Thessa, published an invitation meant to invite only a few friends over to her house. Instead, 15,000 people checked that they would be there - and her parents promptly cancelled the party.
Despite the party-pooper parents, more than 1,500 guests and 100 police officers showed up at the party, with some partygoers even holding up signs asking "Where is Thessa?" and bringing birthday presents and cake.
In response to the presence of police, some revelers even chanting "Thessa, celebrating a birthday is not a crime."
Police spokesman Mirko Streiber labeled the party as "a hit".
"It was sheer insanity but mostly peaceful," he said.
Thessa, who spent the party at her grandparents' house, isn't the first birthday girl to mistakenly invite more than her house could hold to party.
In 2010, 14-year-old Rebecca Javeleau had to cancel her birthday bash after more than 21,000 people clicked "yes" on her invitation - including fake accounts for Justin Bieber, Susan Boyle and Professor Stephen Hawking, the Telegraph reported at the time.
Last February, a family in England came home to find their home trashed after their 15-year-old daughter advertised a small party for her friends - and more than 50 people arrived.