ROYAL FOOTING: A little known fact about Queen Elizabeth II: she has exquisite taste in shoes. For her 1953 coronation, the monarch tapped French footwear maven Roger Vivier to construct a decadent, embroidered slipper with rubies. On Wednesday night, the Roger Vivier company celebrated the momentous occasion and debuted a collection dubbed A Princess to Be a Queen. The line of bags and shoes have a regal air, with jeweled velvet evening bags and sequined sandals with a swirl motif. “We love tradition, but we hate convention,” said Vivier brand ambassador Ines de la Fressange, who flew in from Paris to attend the cocktail party at Vivier’s Madison Avenue store to fete the collection, which hit the sales floor this week. “This is a famous shoe. It was quite an amazing that the Queen took a French designer to make the shoes for the coronation.” Samantha Boardman, Rita Konig, Caroline Sieber and Amanda Brooks were among those who mingled before heading out for yet another night chock full of fashion parties. De la Fressange will be back in the States in November for the opening of Vivier’s Bal Harbour, Fla., boutique.