Nearly half a million Thais viewed a clip from the north east that showed a M2 (second year of secondary) take a beating at the hands of more than a dozen other female students.
The Thai media said they were a female pack of dogs.
"A" had been to a concert at an ordination in Chumpae, Khon Kaen and while there she was dancing and stepped on the foot of someone in a rival group.
An argument developed and they arranged to meet later outside a school to sort it out. It was promised there would be no violence.
But 15 girls turned up and assaulted her with kicks and punches putting her in hospital with swelling to the head.
Five people in total were injured in the cat fight.
Sanook said 460,000 viewed the six minute long clip with 10,000 shares.