The woman suffered serious burns to her legs, arms and torso in the attack, allegedly at the hands of her ex-boyfriend.
Police allege the 17-year-old man used a flammable liquid to burn the woman, following an argument at an Avalon Court residence around 4pm yesterday.
Neighbours heard the girl's screams, before rushing to the property.
"I heard some chick screaming and then police and ambulance rocked up and the fire brigade. They said that she'd been badly burned," witness Jeremy Picken told 9NEWS.
The woman remains in an induced coma at the Royal Brisbane and Women's Hospital.
Her mother has travelled interstate to be by her bedside.
The 17-year-old man will front court on Monday charged with acts intended to cause grievous bodily harm.