Rihanna flashes entire boob as she suffers embarrassing wardrobe malfunction at Ocean's 8 premiere (photos)

Rihanna accidentally flashed her boob at the Ocean's 8 premiere, leaving her blushing in embarrassment as she tried to put her dress in order.

The 30-year-old singer had on a metallic gown with a neckline that partly exposed one of her breasts and the shoulder kept shifting to expose more than the star intended.

At some point, the right shoulder of the dress shifted and almost the whole of her boob was out. She made a grab for her sleeve but she wasn't fast enough because paparazzi got a few shots first.

More photos below.