Inlander says the latest trend in party dresses is long dresses, a change from the micro-mini dresses of the last couple years. She stresses that long dresses aren’t just for super-formal parties, so feel free to rock one at your friend’s cocktail get together. We love this R&M Richards Dress from Macys, $109.

Pair it with: a casual updo or loose waves to keep the vibe fun and not too formal.