WordNet (r) 3.0 (2006):

chichi
    adj 1: affectedly trendy and fashionable
    n 1: someone who dresses in a trendy fashionable way
    2: elegance by virtue of being fashionable [syn: chic,
       chicness, chichi, modishness, smartness,
       stylishness, swank, last word]

Moby Thesaurus II by Grady Ward, 1.0:

66 Moby Thesaurus words for "chichi":
   affected, arabesque, baroque, brave, bravura, braw, busy,
   dandiacal, dandified, dandyish, daring, dashing, dressy, elaborate,
   elegant, exhibitionistic, fancy, fine, flamboyant, flashing,
   flashy, flaunting, florid, flowery, foppish, frilly, frothy, fussy,
   gallant, gay, glittering, high-wrought, jaunty, jazzy, la-di-da,
   labored, luxuriant, luxurious, moresque, ornate, ostentatious,
   overelaborate, overelegant, overlabored, overnice, overrefined,
   overworked, overwrought, peacockish, peacocky, picturesque,
   precieux, pretentious, pretty-pretty, rakish, rich, rococo, showy,
   snazzy, splashy, splurgy, sporty, swank, ultrafashionable,
   ultrasmart, ultrastylish