40 Classy New Year's Eve Outfit Ideas Plus dress code tips. Are you looking for the most beautiful New Year's Eve outfit to knock out the guests or simply to feel like a real queen? Look no further as I found some of the most beautiful dresses and jumpsuits for slim, petite, plus size, and in between. So bear with me for a few minutes because this post will save you precious time from browsing New Year's Eve outfit ideas.