ustin Bieber fans have sent former Playboy model Kim Kardashian death threats after the 16-year old called her his girlfriend on Twitter.

The One Time hit maker met Kim at the White House Correspondents' dinner in Washington over the weekend where Bieber later posted a picture of the pair, calling Kardashian his 'girlfriend.' However, fans of the pint-sized singer were not happy with Bieber's new found love for the Keeping Up With The Kardashian's star and have since lashed out at the model.

The reality TV star reached out to Bieber, tweeting: "Seriously Biebs! @JustinBieber I'm getting death threats from your fans! This is unBeliebable!!!"

The Never Let You Go singer responded Kardashian on Twitter, telling his fans: "Ladies calm down. @kimkardashian is a friend. a very sexy friend but a friend. no need 4 threats. Let's all be friends and hang out often."

Justin has previously stated that he likes an older woman, especially 29-year old Miss. Kardashian after he revealed to Digital Spy: "I think she's cute. And, no, she's not too old for me."