X-Factor's Emily axed after fight

X-Factor star Emily Nakanda has pulled out of the show after being caught 'happy slapping' a girl in a sickening attack.

The video apparently shows the 15-year-old in her school uniform launching an attack on another girl.

In it she gets the girl in a headlock, swings her round by the hair, punches and batters her and shoves her to the ground.

Today's new video came only days after another video which showed her threatening a boy with a knife.

Judge Sharon Osbourne, who mentors Emily on the show, said: "I am deeply saddened by this whole situation."

The latest video was apparently sent via mobile phone to other children near Emily's home in London and published by The Sun.

The victim, identified as Anna, is told "If it rips out I'm gonna get blood on my clothes", the paper reported.