I cannot find anything about Ippolita Obizzi Campeggi other than this portrait. This portrait presumably represents Italian fashion.
From pinterest.co.uk/persephoneia6/xviie-athenaïs-de-montespan/?lp=true.
If this was painted in the 1660s, then the hurluberlu style may have migrated from Italy to France, possibly with the Mancini sisters. The shoulder ribbons look like an American football player's shoulder pads. The upper bodice may have cut outs allowing the white chemise to show through.
Keywords: Gennari - Benedetto the Younger, Ippolita Obizzi Campeggi, Italian, hurluberlu coiffure, earrings, necklace, jeweled fitted bodice, bertha, vee neckline, brooch, bows, quarter length puffed upper sleeves, lace cuffs, puffed middle sleeves, arm bands, lace flared cuffs, bracelets, girdle, vee waistline, gloves, folding fan