From Wikimedia. Also posted to her Subalbum.
The bodice area starts with a modesty piece under a partlet under an under-bodice under a bodice (possibly) under a jeweled surcots. Phew!
Keywords: 1560, Bronzino, straight parted coiffure, hair net, earrings, chemise, modesty piece, lace split partlet, high enclosing neckline, necklace, under-bodice, square neckline, over-bodice, lapels, lining, collar, jeweled surcote, long slashed split full tapered sleeves, contrasting cuffs, jeweled close skirt, gloves, handkerchief