<p><br /> Avid Justin Bieber fans, known as Beliebers, have threatened to kill Selena Gomez after pictures emerged of the singers kissing on a yacht.<br /> </p><p><br /> The teen stars were holidaying with friends in St Lucia over the New Year weekend.<br /> </p><p><br /> However, Bieber fans were quick to criticise the union posting hundreds of messages threatening violence towards Gomez on Twitter.<br /> </p><p><br /> One message read, "Roses are red, violets are blue, @selenagomez if you'll break @justinbieber's heart I'm gonna kill you."<br /> </p><p><br /> Other messages for the actress included, ''I'll kill you I swear on GOD!!!'<br /> </p><p><br /> The youngsters, who are often spotted together, have previously denied that they are in a relationship with Gomez labelling Bieber a 'brother' figure.<br /> </p>
