Marie Caroline Auguste de Bourbon-Siciles, Duchesse d'Aumale, is the blonde hurluberlu coiffured ice queen of Winterhalter's famous portrait of 1846 of her standing in a pink satin evening dress adorned with black lace. As it turns out, she posed for many portraits from 1842, even earlier, almost to her death in 1869. Her Wikipedia article is here.
There was another Princess Maria Carolina of Bourbon-Two Sicilies; she was born in 1859 and passed away in 1941.

1839 or 1840 Princesse de Salerne, âgée de dix-sept ans by Johann Peter Kraft (Musée Condé - Chantilly France)

1842 Marie Caroline Auguste de Bourbon-Siciles, later Duchesse d'Aumale by Franz Schrotzberg (Musée Condé - Chantilly, Picardie, France)

1842 Marie Caroline Auguste de Bourbon-Siciles, later Duchesse d'Aumale by Josef Kreihuber (Musée Condé - Chantilly France)

1846 Marie-Caroline-Auguste de Bourbon-Siciles, princesse de Salerne Duchesse d'Aumale by François Meuret (Musée Condé, Chantilly)

1851 Marie Caroline Auguste de Bourbon-Siciles, Duchesse d'Aumale, by Victor Mottez (Musée Condé, Chantilly)

ca. 1854-1855 Miniature of the duchesse with the prince de Condé and with the duc de Guise on her lap, by Sir William Ross (location ?)

ca. 1855 Duchess of Aumale, Princess of France, Princess of Bourbon-Two Sicilies (1822–1869), by James Sant (location ?)

Marie-Caroline de Bourbon-Siciles, duchesse d'Aumale (1822-1869), en buste by ? (Musée Condé - Chantilly France)
