Singer shows off her new look on Twitter

Pop superstar Rihanna has said goodbye to her blonde locks and unveiled a new edgier look to fans on Twitter.

The 24-year-old showed off her new jet black locks, complete with one shaven side, while on a promotional visit of Japan.

RiRi was promoting her new film, Battleship, and staged an impromptu photo-shoot for her fans to show off her new style.

One snap features her dressed in a Rolling Stones T-shirt with animal-print trousers and heels making a gun gesture to her head and grabbing her crotch.

She uploaded the snap with the caption, "Cuz I'm black b"tch" on her Instagram account and her Twitter feed.