Girls' 15th birthday parties are often a huge affair in Latin America, when families pull out all the stops to welcome them to womanhood.
But Rubi's "quinceanera" party took the phenomenon to a whole new level, after the invite became an offbeat internet sensation.
"We found out through social media and we said 'Let's go. Everyone is invited? Let's go," said Tania Rodriguez, who traveled five hours by car to attend the party held in a large field in Villa de Guadalupe, in San Luis Potosi state.
About 10,000 partygoers of all ages came to see Rubi, who danced the night away in a flouncy, floral princess gown with a dramatic red skirt.
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The teen was the center of attention on a large rock concert-style stage set up in the field. The evening featured fireworks, a huge banquet and a concert broadcast on a giant screen.
Rubi danced with friends, as well as the men of her family, receiving a rose from each, in keeping with tradition.
"Hi, how's it going? We would like to invite you this December 26 to our daughter Rubi Ibarra Garcia's 15th birthday party in La Joya," her dad, Crescencio, said in the video invitation.
Dressed in a cowboy hat typical of northern Mexico, he ticked off the names of the bands that would play at the party and announced a horse race with a 10,000-peso prize (about USD 500), as his wife and the now-famous Rubi stood at his side.
About 1.3 million Facebook users took the invitation to heart and replied that they would attend the party originally set to be in La Joya, a village of 200 people near the city of San Luis Potosi.
"This all got out of control," Crescencio said in one of the many media interviews he has since been asked to give.
"That doesn't mean we didn't want to invite everyone, of course, but here our parties are regional... This is something we weren't expecting."
Rubi fielded numerous interviews herself, becoming something of a national sensation with her dark hair, cute smile and braces.
Disclaimer: No Business Standard Journalist was involved in creation of this content