Very short hair—such as shorter than chin-length—can be glamorized for prom in the fashion of Sarah Audrey. She has lots of wavy and curly hair in a modern retro style with dark blonde haircolor.
With retro hair and a vintage dress, this look would be good for a vintage-inspired prom theme. Lots of retro hairstyles from the 1920s through the 1940s were as short as this wavy bob hairstyle.
Sarah's evening dress has a very worn vintage look. The shiny gold 'shawl' that she wore with it adds a lot of glitz and glamour. Quite a cute night style, but the dullness in color of worn vintages dresses isn't for everyone.