While we realise the approach of February fourteenth can stir fear, adoration, or other inexplicable emotions in the hearts of many, for us it simply reignites our desire for one of our greatest sartorial loves: lingerie. A key staple for any wardrobe, pretty lingerie is a necessary and instrumental tool for bequeathing a little bit of loveliness to your ensemble, or adding a hint of sex appeal peeking out from beneath your favourite tank or tee. Like a shiny bauble or bejeweled accessory, a lacy bra or winsome nightie can be undeniably alluring and make you feel as though you indulged in a wonderfully luxurious treat.

While our devotion to underpinnings is year-round, it is especially current in light of the lingerie craze seen on the spring runways. Underwear as outerwear emerged as a theme at a few of our favourite shows and surfaced as particularly noteworthy at Christian Dior. Taking inspiration from Lauren Bacall and the screen sirens of forties film noir, Galliano sent his red-lipped, shiny haired models down the runway in sheer lacy dresses, black and crème corset tops, and lace-edged silk bloomers. The effect was glamorous yet romantic, sexy yet sophisticated, and left us lusting for lingerie!

Yet, while lingerie-inspired clothing is absolutely on-trend and appropriate, the items we're spotlighting today should be kept strictly under wraps. Though they shouldn't be an easily observed part of your personal style, we promise that those who are privy to your intimate wear will be easily won over by your posh boudoir taste. Additionally, we'd like to think that wearing a pair of zebra-striped panties or vintage-inspired lace bra might give you a little lift too. Hopefully these special pieces will leave you feeling slightly sultry, or perhaps offer the perfect dose of inspiration for your final ensemble. After all, a chic outfit should always begin with a fashionable foundation, and we think there's no better way to plant a stylish seed than to build it with Under $100 lingerie! (Full disclosure: each piece is under $100, even if the full sets are not.) So without further ado, we'll all slip into something a little more comfortable and bring you a few of our favourite (and frugal!) items for spring!

H&M Bra ($13) and Underwear ($10)
In the Balenciaga S/S 10 show, models strutted down the runway in geometric tops and dresses with surprising bursts of mesh inset. While the collection did not directly feature outerwear as underwear, Nicolas Ghesquière's streetwise vibe can be seen in this H&M set. The mesh detailing, black-on-black paneling, and boy-cut bottoms are sporty and modern, while the sheerness of the set is sexy indeed. Additionally, this fashion-forward bra top has offered up something practical: providing some welcome and supportive underwire. We recommend styling it with any of your favourite racer-back tanks, or under a sheer neon coloured top for a directional Balenciaga-inspired look.

Elle Macpherson Intimates Obsidian Greer Bra ($80) and Greer Bikini ($30, 866.593.2540)
Elle Macpherson is one of our favourite stylesetters, so we were thrilled when the yummy mummy launched a new range to her namesake lingerie line. The Obsidian collection which debuts this spring includes the same sartorial spirit of her beautiful sets that we always lust for, but is designed to be a bit edgier with a starker colour palette. This eye-catching zebra-print bra and bikini set (which also comes in a hot thong version!) is one of our top picks from this emerging selection. We love how Macpherson translated the animal craze to her intimates, making this an ideal option for any trendsetter with a taste for the wild side. Additionally, while the white lace embellished bra straps will look super-sexy popping out from under any tee, we'd recommend pulling out all the stops and opting for a tank with an exaggerated arm hole to allow for the chic pattern to be seen in plein air.

Aerie Chambray Vintage Romper ($30, 888.232.4535)
One of our most surprising and wallet-friendly finds for the day is this adorable Aerie romper. Not only does it echo the vintage pin-up styles seen at Christian Dior, it also invokes one our other favourite spring trends, pretty pastels. The powder blue hue is akin to the soft shades seen on the Burberry Prorsum S/S 10 runway, and we love the sweetly delicate detail of the crème lace. Additionally, while this is a charming piece to sleep in, we could easily see a trendsetter like Kate Moss wearing it out under jeans for an ethereal warm-weather look.

Cosabella Devon Underwire Bra ($64) and Lowrider Bikini ($42) in Natural
We have long relied on Cosabella to fill our lingerie drawer with luxurious underthings, and this neutral toned set is no exception. While it is the most classical of today's offerings