When it comes to getting dressed up for a swanky party, accessories can transform the simplest of outfits. Start with a pair of dangly earrings, add some gold-trimmed shoes, and finish it off with a great clutch. Smooth leather pouches that easily squash under the arm can skew too casual for these types of events, so opt for something more structured. Sleek miniaudières feel luxe, even when they're under $100, like Zara's mother-of-pearl version or Oasis's slick silver box. For a more whimsical look, try Nasty Gal's clutch with a lipstick-shaped clasp, or Kate Spade's that cheerfully proclaims, "Pop, Fizz, Clink!" And should you want to invest in something unusual, Rafe's iridescent shell or Sarah's Bag's beaded lips are surefire conversation starters. Just remember that space inside is limited to the barest of essentials — keys, a lipstick, and your iPhone.