Courtesy of Leonisa

When we're down, they raise us up to new heights; when we're lacking confidence, they give us the support to get out the door. A good bra is like a bestie for your bust. And when it comes to your wedding day, the relationship is truly tested. Here, a guide to all the bare necessities you can count on when you need them the most.
Cosabella, Sassybax, DuMi

Cosabella Marni Strapless Plunge Bra, $132.50,
This mini bustier has just the dip required to accommodate a deep V. Though the neckline takes a plunge, that doesn't mean your girls will follow suit. The molded underwire lifts and shapes, while the longer line provides added hold.

Sassybax Very Bare, $78,
It may seem to defy the laws of gravity, but this backless, strapless wonder can actually accommodate up to a DD cup, so even well-endowed brides can don a low-back dress. Thanks to strategically placed silicone adhesive inside the top and bottom of the cups and on side tabs, this bra won't move an inch.

Taupe Contouring Bra Cami by DuMi, $68.00,
A figure-skimming sheath is not the most forgiving silhouette, but this bra-cami with a built in shaping bodice nips your tummy and waist so there won't be a bulge in sight. Soft cups provide the support of a bra without uncomfortable wires. Adjustable straps let you lift easily when you need to.

Fantasie, Cosabella, Spanx

Fantasie Ava Underwire Molded Strapless Bra, $86,
Molds and holds even the most ample assets so they stay safe and secure. A balcony design, underwire and side boning anchor and support up to a GG cup. Detachable straps make it a versatile option under multiple necklines.

Cosabella Never Say Never Flirtie Bandeau Bra, $52.50,
Whether your dress has a built-in bra or you need a little something to feel secure, a bandeau gives coverage and comfort in a way that feels like second skin. The stretchy band fits like a tube top and has no fussy hooks or wires. Silicone along the top and bottom keep it from slipping and a little side boning has extra support.

Spanx Bra-Cha-Cha Strapless Bra, $68,
The stay-put support you need to dance the night away in a strapless gown without having to worry about any unexpected peepshows. The cups are satiny smooth and engineered with a no-slip strip in the back so nothing will budge.

Leonisa, Miss Oops

Leonisa Bustier Minimizer Vest in Lace, $54.99,
The undergarment that works overtime, his powerhouse bustier streamlines any silhouette, tones tummy troubles and minimizes an ample bust line. And if that's not enough, side boning helps you stand up straighter.

Miss Oops Show Stoppers, $16,
If you're perky enough to go braless but still want to keep things discreet. These reusable silicone nipple covers are the perfect solution. The tapered edges make them invisible under even a sheer sheath and you can wear them up to 15 times.