Last week Kim Kardashian revealed on Twitter that she had 'Bieber Fever' after meeting teen heart-throb Justin Bieber at the White House Correspondents' dinner.
And the young singer, who had previously mentioned his crush on the pretty socialite, posted a photo of the two and joked, "Look it's my girlfriend."
But it seems Justin's admirers didn't see the humour in the situation, and on Tuesday, Kim revealed on her Twitter page that she had received unfriendly messages.
"Seriously Biebs! I'm getting death threats from your fans! This is unBeliebable!!!" she posted.
Justin, however, took matters into his own hands.
"Ladies calm down," he wrote. "Kim Kardashian is a friend. A very sexy friend but a friend. No need for threats. Let's all be friends and hang out often."