rihanna x factor william tempest.jpg

Wowing both the studio and TV audience on the The X Factor this weekend was Rihanna. Not only did she execute a fun performance, complete with a food fight, her outfit of choice was also another corker! Wearing customised dress designed by William Tempest, the structured hem number (known as the Oyster dress) was a stand-out piece from the designer's S/S '11 collection. Together with her bright red hair and flowery headpiece, Rihanna almost stole the limelight away from judges Dannii Minogue and Cheryl Cole.

Check out a video of her performance after the jump...

[via Just Jared]