Rihanna has debuted a new short hair cut with waves by posting photos onto her badgalriri Instagram account.

The singer posted pictures of her new hairdo with the message: "Still tryna get used to my hurr, so I threw on some #redlipstick #RIRIWoo."

The "Umbrella" singer only just debuted her long grey hair two weeks ago before undergoing another drastic change in her hairstyle.

According to E! News, the latest style is the "sixth dramatic hair makeover she's had in 2013." The singer has gone from pixie cut, to brunette waves, grey hair, and more.

In other Rihanna news, the 25-year-old has won her High Court challenge against Topshop for using her image on a T-shirt without her permission in the UK.

The popstar had sued the fashion chain's parent company, Arcadia, for $5m, claiming that fans may have been misled into thinking that she had approved them.

Judge Mr Justice Birss ruled in her favour, saying that a "substantial number" of shoppers could have bought the T-shirt out of a "false belief" that the image had been approved by the singer.

Rihanna has been nominated for MTV Video Music Award's Best Female Video for her song "Stay" featuring Mikky Ekko.

The MTV Video Music Awards will be held at the Barclay Center in Brooklyn on August 25 and fans can vote for their favorite artists. Voting will end on August 24 at 6 p.m. ET.