Rihanna Rocks Red Hair in Rio

rihanna rude boy

Rihanna unveiled a new look at the Rock in Rio Madrid festival over the weekend, sporting fire engine red hair and a barely-there outfit while performing "Rude Boy," "Disturbia" and more hits for a reported 87,000 fans.

Video: Rihanna performs at Rock in Rio 2010

Photos: Rihanna's Fashion Evolution

Wearing a cone bra that would make Madonna proud, the leggy pop star headlined the annual Rock in Rio fest along with Shakira, Miley Cyrus and David Guetta.

What do you think of Rihanna's new look?

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