raving twitter lunatic threatens alexandra burke on twitter

23-year-old Alexandra Burke has become the latest celebrity to receive a string of vile death threats via Twitter.

The singer was sent a barrage of frightening messages on the social networking site after announcing the launch of her Lip Boom gloss lipsticks at Rose Club in central London.

Alexandra was apparently forced to call in extra security because of the threats; a source close to her revealed:

“Alex’s mum was particularly upset by the horrible messages so she decided it was best to contact the police.

“They went down to the venue before the party started, and Alex had a team of security around with her all night to make sure that she stayed safe.”

Despite the menacing messages, Alexandra managed to put on a brave face at the actual launch for the lip gloss range (one shade of the gloss is called “OK.com” while another is called “Bring It” – no seriously, we’re not joking) last night, though perhaps that had something to do with the presence of rumoured boyfriend Jermaine Defoe at the event