Rihanna has hired extra security to protect her.

The 'Stay' singer - who obtained a restraining order against an obsessed fan last week after he broke into her neighbour's home, which he mistook for the 25-year-old popstar's property - was spotted with five new bodyguards while leaving a Los Angeles nightclub on Saturday (02.03.13).

According to gossip website X17.com, the star was flanked by the burly men as she enjoyed a girls' night out at Playhouse without her boyfriend Chris Brown.

Her beefed up security team comes after she was assaulted upon leaving a London nightclub last month and forced to seek medical attention.

The singer was targeted in an unprovoked attack by a man, who hurled a bottle of Lucozade at her, while she was leaving exclusive nightclub The Box with her model pal Cara Delevingne.

The force of the glass bottle caused the Barbados native to fall and cut open her knee.

Her bodyguard's leg was also said to have been injured as he attempted to catch her attacker, who allegedly shouted something about her boyfriend Chris before throwing the bottle at her.