See photos of Sydney Sweeney's '80s prom-themed 26th birthday party, attended by celebrities including Anitta, Camila Mendes, Nicola Peltz and Dylan Mulvaney.

All week on Vulture, we’re examining ‘80s pop culture, and how it lives on today. “Get Out Your Shoulder Pads: The ’80s Are Here.” “The ’70s Are So ’90s. The 80s Are the Thing Now ...