Police officers are investigating a pair of death threats made against teenage singer Rebecca Black.
According to Reuters, the 'Friday' star received two threats via her production and management companies in March.
Rick Martinez, a spokesperson for 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."
Reports claim that one threat was made by telephone and the other by e-mail.
The video for 'Friday' has attained over 100 million views and the 13-year-old singer has attracted support from celebrities including music mogul Simon Cowell. In addition, the track will be covered on a future episode of Glee.
Black has been vocal about the criticism she has received for the song, saying that although opposing YouTube comments do not bother her now, initially she felt like the negative attention was her own fault.