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From a printed polka-dot midi dress to a velvet romper perfect for a night of dancing, read on for 15 stylish birthday outfit ideas to copy

Faux pearl trimmed sleeves and neckline

The Gap Modern Straight Khakis are the most affordable pants among our picks (and theyre often further discounted)

That year, Allen performed alongside Gregory Hines bringing not only her spectacular moves but a timeless look that could easily be worn on the carpet today

When in doubt, ask your date what other people are wearing and err on the side of more formal, since being slightly overdressed is always more graceful than being underdressed at an event like this

Dark Green Corset Mermaid Spaghetti Straps Satin Bridesmaid Dress with Sequins Bust: Wear the bra you will be wearing with the dress, and pull the tape across the fullest part of the bust