The most important night in Hollywood is still a few days away, but three stars had their big red carpet moment at the 2012 Brit Awards in London Tuesday night.

Rihanna rocked her third plunging look since the Grammys, stepping out in a dazzling gold beaded Givenchy Haute Couture by Riccardo Tisci halter gown with slits up the front and back. The "We Found Love" singer, 24, accessorized with leather opera-length gloves and embellished heels.

PHOTOS: Rihanna's daring style

Former X Factor judge Nicole Scherzinger, 33, wore her most gorgeous look ever: a lemon-colored strapless Versace gown with gold studded details, strappy platform heels and gold dangly earrings.

PHOTOS: What the stars wore at the 2012 GrammysBritish singer Jessie J., 23, who also turned heads at the Grammys in a figure-hugging silver Julian Macdonald bustier design, wowed in a red sheer Falguni & Shane Peacock gown with strategically placed floral embroidery and red undies. She rocked dramatic smoky eyes and bold black nails.

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