The easiest foundation piece for any of these aesthetics is a smocked bodice dress with some puffy sleeves
Online retailers can have even more affordable options, though its wise to read reviews carefully to check for quality and sizing
Heres what were seeing everywhere right now (and how to style it without overthinking)
Buy Kwunbwa Elegant Off The Shoulder A Line Mini Dress Color Block Short Dress | Strapless, black and white, sexy, stretchy fabric, for formal, grad, homecoming, party, graduation, vacation, birthday, prom and other Club & Night Out at Amazon.com
If it's a cold night and you'll be outside, wear another layer under your pajamas or throw on a robe and some cozy slippers
The puffer jacket was a winter staple for young men in the 80s, who liked the sportier appearance