Princess Owusu Ansah, a Ghanaian-British adolescent, was sentenced to three years in prison for pouring hit water on a friend and stabbing her in retaliation for allegations that the friend stole her fiancé.
The vicious assault on Princess, which was live-streamed on Snapchat, boosted her popularity earlier this year.
She went to the home of her alleged boyfriend-kidnapper in East Dulwich, South London.
Screaming at her companion to apologize for "trying to f*ck her man," she stabbed her and then doused her with boiling water.
Princess was sentenced to three years in prison at the Inner London Crown Court after pleading guilty to grievous bodily injury and criminal damage.