Showing off a new dark hairstyle, singer Rihanna joined the cast of "Battleship"

It seems like only yesterday that Rihanna bleached her hair a bright yellow blonde and Tweeted photos of her light hue. She debuted her light locks at the Grammys and explained the hair colour change to Ryan Seacrest weeks later.

Hollywood Reporter quoted her as telling Seacrest: "I want to go black and I was in a natural colour so it was easier to go blonde first. Now I am attached to [being a blonde] and keep going lighter and lighter but it's easy to go to black from here."

True to her word, Rihanna has now gone to the dark side. The 24-year-old singer posted a series of photos on Instagram highlighting her new black locks. “Cuz I’m black b***h," she tweeted with one of the pics.

The colour change comes just in time for her red carpet walk at the premiere of Battleship, her big-screen debut.

Rihanna is currently in Japan to premiere her new flick Battleship. ““#JETLAGGED so I’m up watching TV…..all in Japanese!” Rihanna tweeted about her first night in Japan.

Battleship opens on May 18.