16-year-old Justin met his 29-year-old idol, Kim, at the White House Correspondents' Dinner on Saturday.
But since declaring she has 'Bieber Feber', Kim says she's been getting death threats from the Beeb's jealous tween fangirls.
Seriously Biebs! @JustinBieber I'm getting death threats from your fans! This is unBeliebable!!! she tweeted.
Seriously? he replied.
When asked about his crush on Kim earlier this week, Justin told Showbiz Spy, "I think she's cute. And, no, she's not too old for me."
Look out Kim, you'd better ramp up security!