If I were super famous and could pull off wearing pants (because let's face it, only the obscenely famous, and Janelle Monae, can wear pants to such high profile events), a simple yet intricate jumpsuit with a killer pair of colorful heels would be my first choice.
The grecian look is a classic and always a red carpet hit because it's so classic. I would go for an updated version, with unexpected colors, ruffles, or drapes.
Eye-catching detail and high-class workmanship is another red carpet option that many celebrities choose. The old Hollywood, flapper inspired, art deco-y black and nude look would certainly garner some attention, while a more victorian beaded mini dress with a train would be a little more trend-setting. I would style it with a black belt instead of the matching nude, and probably a black beaded something in my hair.
I can see it now: people cheering, 'Who are you wearing?,' being escorted to my green-seats equivalent seats, after parties hanging out with Charlize Theron, Nicole Kidman, Hugh Jackman, etc, and waking up the next morning to being on all the best-dressed lists. A girl can dream.
(photos collected from urbanoutfitters, catherineneicole, tamarachloestyleclues, shopbop, mirazwillinger, modnipeklo, and thestars-themoon)