Demi Moore in sparkling Armani Privé, Elle Fanning in Sarah Burton's inaugural haute-couture look for Givenchy, and Cynthia Erivo's dramatic Louis Vuitton gown were among the night's style highlights.

Ariana Grande did her Glinda proud in a pale pink stunner, and her “Wicked” bestie Cynthia Erivo honored Elphaba in deep forest green on the Oscars carpet as high glam took over Sunday. Others went ...