PHOTOS: REX FEATURES WHEN DONATELLA VERSACE unveiled the surprise supermodel finale of September’s S/S ’18 Versace show, it wasn’t so much a moment as The Moment of the year in fashion. Twenty years after her brother Gianni was murdered in Miami, Donatella paid tribute to his legacy with a collection that referenced his greatest hits. And what could be more quintessentially Gianni than the quintet of original supermodels, and Gianni faves, Donatella chose to close the show ? There they were: Carla Bruni, Claudia Schiffer, Naomi Campbell, Cindy Crawford and Helena Christensen, imperious, resplendent and utterly fabulous, a phalanx of Studio 54-ready goddesses in gold chain-mail (but you’ll know that, of course, you’ll have seen it all over Instagram). The audience went wild, the internet broke, the ’90s models proved…