THE Twittersphere is up in arms over the news that a teenage girl fell victim to the self-harm Justin Bieber campaign.

Trolls were convincing young people to deliberately harm themselves in pop star's name. But be warned, most of this story was faked and there's a lot of double-crossing.

The plot was the allegedly creation of users from the forum 4Chan, who last night were reportedly also found to be planning to fake the death of a teenage girl and blame it on Bieber. Screenshots from chat program IRC show a secret meeting of members of a forum discussing the scheme.

The members planned to convince the internet that a girl named Addison died after she became a victim of the Bieber self-harm hoax. Though the campaign was phrased in a way where teenagers promised to stop self-harming if he stopped smoking, forum users declared on the 4Chan site: "Let's start a cut yourself for Bieber campaign… see if we can get some little girls to cut themselves".

In the chatroom conversation last night, people who appeared to be 4Chan members planned to create a bogus Twitter hashtag #rememberAddison, BuzzFeed revealed.

The group even created fake Twitter, YouTube and Facebook accounts for "Addison", and a boy recorded a soundcloud file about Addison.

They also recorded two fake audio files and a YouTube video claiming to be from Anonymous, mourning Addison's death and vowing revenge against Justin Bieber.

The plot also involved a fake image that purported to be a screenshot from Justin Bieber's official Twitter account.

The participants discussed their aim to blame the entire hoax on rival site 9Gag, who have since 2011 been the subject of the hackers' ire after allegedly taking credit for memes that originated from 4Chan. In a new trolling twist, there are now reports the IRC chat leak may have been set up by 9Gag to direct blame at 4Chan.

Within hours the #rememberAddison hashtag was trending on Twitter, where it appeared users were blaming Bieber for Addison's death, many of which came from 4Chan members.

Since BuzzFeed unveiled 4Chan's alleged scheme, posting screenshots of the chat on the site, the chatroom members have threatened to take down the site with a Denial of Service (DOS) attack.

Though a fake, the campaign has potential to put vulnerable teens and others in harm's way. BeyondBlue warn that self harm is a serious issue and is often a way for people to deal with distress, anxiety or depression.

If you or someone you know may be at risk of suicide contact Lifeline 13 11 14, beyondblue 1300 22 46 36, or Salvo Care Line 1300 36 36 22.