She liked to gamble and may have had a good sense of humor according to Wikipedia.
Upgrade image posted 30 September 2012 from the Google Art Project; spots removed with Photoshop and image enlarged by half by gogm.
This shows Eleonora de Toledo's jeweled net headdress in her 1544Bronzino portrait.
Keywords: 1544, Bronzino, straight coiffure, jeweled headdress, necklace, earrings