But no, Kitty really briefly dressed that way:
After seeing her perform in concert, Kitty designed herself a costume modeled after Dazzler’s. Much to the X-Men’s amusement, Kitty wore a golden skintight suit, a similar pair of roller skates and some ballet leotards on top of it. [Uncanny X-Men #149] Xavier, however, was not happy with this design and reminded Kitty that one had to earn the right for an individual costume, so she returned to wearing the standard outfit.
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