The 'We Found Love' star, who has recently been promoting the worldwide release of Battleship, was spotted leaving Italian restaurant Giorgio Baldi in Santa Monica.
Hiding her face from the paparazzi after returning to her waiting car, the singer proceeded to stick both middle fingers up as it drove off.
During a visit to the restaurant last month, Rihanna also gave the finger to photographers, amid initial reports of her alleged relationship with actor Ashton Kutcher.
The 24-year-old has recently hit back at interviewers who have attempted to question her about her private life.
After criticising a British journalist for their "disappointing" question, Rihanna was also left annoyed by a similar attempt by Australian breakfast programme Sunrise earlier this week.
> Rihanna, Brooklyn Decker wear 'Battleship' director Peter Berg T-shirts
Watch Rihanna shut down a question about her private life below: