35 Flattering Pieces That Make Some Seriously Jaw-Dropping 21st Birthday Outfits

Go for a wild print that speaks to your playful side in this Zara Printed Short Dress ($40). The print alone has us sold, but the silhouette and fit are the cherry on top of the cake.

This slim-fitting Sokie Collective One Shoulder Going Out Top ($69, originally $98) will make a sleek impression at the next date night or friends' night out. The single-shoulder silhouette dials up the allure, while the overall design is versatile and easy to pair with laid-back denim jeans or polished skirts.

This H&M Crop Cardigan ($40) will turn heads wherever you go, because it's so distinctly chic and effortlessly elegant. The muted shade makes sure you can style it with everything, from tan tailored trousers to a structured midi skirt.

These glossy Zara Full Length Faux the '90s Leather Pants ($50) will amp up any look, whether you pair them with an asymmetric top, a knit sweater, or a fitted blouse. They are professional enough for daytime work meetings or after-dark parties.

The side strings of this Nasty Gal Ruched Satin Cowl Mini Dress ($24, originally $59) give it texture, while the satin fabric will likely feel soft to the touch. It will hug your curves nicely.

This ASTR the Label Alva Body-Con Midi Dress ($138) is a chic way to do lingerie-style dressing. It oozes femininity and confidence, and it's perfect for a night on the town.

This Dress the Population Martine Stretch Crepe One-Shoulder Dress ($148) makes a sleek, modern, and sexy statement in your closet. If it gets chilly, just wear it under a leather jacket or a trench coat, and you'll be good to go.

This Nasty Gal Recycled Rib Button Front Crop Top ($9, originally $48) features a corset bodice and a plunging neckline for maximum allure. Whether you style yours with casual jeans or amp things up with sleek leather trousers, you will look effortlessly stylish.

Show off your back in an elegant way in this Nasty Gal Knitted Ribbed Midi Dress ($24, originally $59), which features a high neck, a relaxed silhouette, and long sleeves. Style it with strappy heels.

The square neckline and relaxed silhouette of this Nasty Gal Jersey Plunging Sweetheart Neckline Slit Front Midi Dress ($24, originally $60) make it extremely wearable. Pair it with a dainty chain necklace or a chunky gold style, and finish with stiletto heels.

This A.L.C. Eleanor Rib-Knit Cardigan ($95, originally $395) is refined enough to wear on festive occasions yet still casually elegant for everyday moments. Pair it with the matching A.L.C. Logan Rib-Knit Flared Pants ($95, originally $395) for the ultimate chic set.

The psychedelic heart print of this Elenor Wild Hearts Long Sleeve Ruched Minidress ($138) makes it stand out, and we also appreciate that it's cut from a recycled mesh fabric. The silhouette is flattering, making the dress a perfect pick for a date night or friends' night out.

Reserve this OPT Gertie Dress ($82, originally $137) for dressy occasions like a hot date or office party. The asymmetrical cutout is unexpectedly playful, definitely dialing up the allure. Pair it with tall heeled boots or strappy heels.

This Enza Costa Silk Rib Angled Neck Midi Dress ($225) oozes sex appeal, confidence, and femininity. It's a great one to dress up or down, depending on the mood.

This H&M+ Lace-Trimmed Slip Dress ($35) oozes easy elegance, plus the fabric has a luxe appeal. Style it with a blazer for the office and on its own with mules for date night.

The print and silhouette of this AllSaints Melody Pembury Midi Slipdress ($155, originally $259) make it stylish and airy. Pair with sneakers for a laid-back look or low-heeled mules for a dressier appearance.

Christopher Esber is one of the hottest designers of the moment, known for his feminine pieces that ooze easy elegance and sensuality. We're crushing on this Christopher Esber Ruched Crop Shirt ($336, originally $480), which we're planning to pair with high-waisted jeans for a semidressy look or leather pants for a more polished ensemble.

In a sea of wrap dresses, this Nasty Gal Wrap Front Satin Midi Shirt Dress ($40, originally $99) will definitely stand out. Cut in gleaming satin that will nicely hug your body without making you feel restrained, it will pair well with heels and a chunky gold necklace.

This Ruched Satin Effect Shirt ($50) is a fun twist on a typical white button-down, and it packs just as much day-to-night versatility. We like the ruched detail and easygoing fit.

This Buttoned Textured Weave Blazer ($119) will make you feel in charge, thanks to the structured silhouette and imposing presence. We love it paired with a matching skirt for a standout suit or with tailored trousers or jeans depending on the occasion.

We can totally see Lori Harvey rocking this Naked Wardrobe One-Shoulder Faux Leather Midi Dress ($108), how about you? Channel your inner femme fatale in this fitted leather number that brings a shoulder-baring silhouette and sleek faux-leather finish.

We love a printed dress, so this Zara Printed Short Dress ($50) immediately caught our attention. It has a relaxed yet put-together air that makes it a winner in our books.

This Nasty Gal Recycled Ribbed Knitted Cut Out Midi Dress ($15, originally $89) is cut in a soft fabric and features an unexpected bodice cutout that amps up the sex appeal. We guarantee you'll be repeating this outfit!

This sultry Significant Other Monza Cutout Jersey Midi Dress ($220) features front cutouts, signature drapery, and a slim fit, perfect for cocktails on a roof. It has an understated elegance that makes it ready for your next date or vacation night out.

This Minkpink Willow Ruched Jersey Dress ($90, originally $129) will accentuate your figure, thanks to its lustrous knit and slinky silhouette. It will look great with mules or kitten heels.

This & Other Stories Off Shoulder Tulle Midi Dress ($249) looks straight out of a fairy tale with its voluminous neckline and air of royal elegance. Save it for a fancy gala or a themed holiday party.

This lustrous Self Portrait Lace-Detailed Taffeta Midi Dress ($555) is cocktail ready. It features slightly dramatic puff sleeves, a pleated bodice, and ruched detailing for a flattering fit and polished look.

The green jewel tone of this J.Crew Open-Back Silk Charmeuse Dress ($262, originally $328) gives it a luxe appearance, while the side slit amps up the sex appeal. It also features a head-turning open back, which makes it an all-around irresistible look.

This H&M Rhinestone-Embellished Rib-Knit Top ($35) is an easy way to look polished and put-together. Complete the look with leather pants or a slip skirt.

This H&M+ Rib-Knit Dress ($40) dials up the allure with the neckline, and we like the matching turtleneck piece if you opt for more coverage and warmth. The rib-knit fabric makes it look quite polished.

Flaunt what your mama gave ya in this flattering Naked Wardrobe Hourglass Midi Dress ($64). It will hug you in all the right places with its figure-sculpting silhouette, polished fabric, and charming hue.

This ASTR the Label Halter Neck Satin Maxi Dress ($89) will move beautifully with every step thanks to its figure-sculpting silhouette. The ruched details, halter neck, and side slit all come together to create a sultry effect.

You'll feel confident and sexy in this head-turning AFRM Adut Cutout Bodice Long Sleeve Mesh Midi Dress ($88). Complete the look with some thong sandals and a cute shoulder bag.

The subtle print of this Nasty Gal Satin Animal Jacquard Midi Dress ($24, originally $60) gives it visual interest, while the ruched bust and square neckline give it a feminine edge. Paired with your favorite pair of mules, it makes a decidedly polished, head-turning ensemble.

This body-hugging The Drop Laila Power Shoulder Twist-Back Midi Sweater Dress ($55) is a seductive style that will certainly get everyone's attention. The open-back adds to the sex appeal.

Norma Kamali is a master of the female form and of effortlessly elegant silhouettes, and this Norma Kamali Halter Turtle Side Slit Gown ($109, originally $145) lives up to the designer's excellence. Plus the vibrant pop of pink is undeniably glamorous.

If you're going to go for a classic slip dress, then make it one that will definitely stand out. This ASTR the Label Gaia Sleeveless Midi Slip Dresss ($98) is a guaranteed way to turn heads wherever you go.