Rebecca BlackYouTube sensation Rebecca Black has recently received death threats serious enough that police are investigating them.

Reuters is reporting that the Anaheim, Calif., police department is looking into two death threats made against Black, 13, who is best known for her much-maligned Internet hit 'Friday.'

A spokesman for the Anaheim police said, "In essence, the threats were related to getting the music off the Internet or they were going to kill her."

"We can't validate how serious they are, but we do take it seriously," the spokesman continued.