But given that ALL of her is levitating, it's hard to imagine she needs support wear to keep her chest high'n'dry.
One might also argue it's not the responsibility of the creators to make their fantasy creations easily imitable by us mere mortals. In fact, it could easily be argued that it is their responsibility to do exactly the opposite, as "mythical" and "larger than life" and "fantastic" are qualities typically associated with good superhero writing.
Why people seem so intent on ripping wings from faeries is beyond me.