Keke's stylist Molly Dickson unveiled the fashion flashback on her Instagram ... According to Instagram, the stunning gown was sold by Vintage Martini Consignment in Dallas, Texas, in December ...

You get the Vogue Vintage Market ... This metallic beaded and sequined ‘Tallulah Princess Dress’ by Alice + Olivia has bona fide pop royalty credentials—it was worn by none other than ...