Justin Bieber just can't catch a break. First, some girl comes out and says he's her baby daddy. And, now, another girl threatened to kill his ex-girlfriend, Caitlin Beadles, and his current girlfriend, Selena Gomez, in a pretty detailed manner.

The 14-year-old girl - whose name is withheld - took to her Tumblr account to make the threats, under the username KILLSGANDCB. Which, if you didn't notice, is Gomez's and Beadles's initials. The threats were mostly geared towards Beadles, who the girl said she was going to "murder," adding that Beadles wouldn't know what was coming until she "wakes up on the other side of her bed with a knife."

LAPD obtained a search warrant after the threats were discovered. 

According to TMZ, the girl lives in Kentucky, and is developmentally disabled. Her mother is now "closely monitoring" her Internet activities.

[Via TMZ]