Actress Selena Gomez, 18, has become the victim of a jealous hate campaign from female fans of the 17-year-old star.
'I'm gonna kill ya in the night underneath your smell bed.'
Another sent the message:' Selena Gomez is dangerously close to a long, slow painful death.'
Gomez incurred the wrath of Bieber fans, known as Belibers, after she and the singer went public with their romance.
The couple, who for months kept their romance secret, were photographed kissing while on holiday in Maui, Hawaii.
Shocking: The 18-year-old has received messages saying 'I'm gonna kill ya' and she's 'dangeously close to a long, slow painful death
Gomez, who starred in the Disney TV series The Wizards of Waverley Place was photographed frolicking in the sea, kissing the pop star with her legs wrapped around his waist.
The open show of affection enraged many of Bieber's devoted young fans who took to Twitter and Facebook to vent their anger.
One Facebook page: 'I hate Selena Gomez cuz she is dating my man' had attracted almost 2,000 people who posted a series of derogatory comments.
Puppy love: The couple had kept their romance secret for months but are now openly showing their love for one another
One fan warned: If Selena Gomez breaks Justin Bieber's heart, I will break her face I will kill her without kindness.'
Other wrote:' She is just dating Justin for fame'.
Bieber's huge fan base on Twitter and Facebook helped him be named as the third most powerful entertainer in the world.
The Canadian born singer has nine million followers on Twitter and a YouTube video of his hit 'baby' has been viewed more than 500 million times.