Sometimes the biggest confidence booster is concealing something special under your clothes—such as a winning lottery ticket in your pocket or a tattoo of yourself solving a complicated math problem. Get some confidence catalysts with today's Groupon: for $30, you get $65 worth of lingerie online from Biatta Intimates.

Biatta's online boutique crowds armoires with bras, panties, and sleepwear that delight eyes and bodies of all types in saucy and supportive styles. The Liza demi bra ($20) and matching hipster underwear ($10) complement curves with gray stretch lace, purple ribbon trim, and vintage Chevy fins. A black-and-ivory pinstriped After Hours bustier ($34) emphasizes hourglasses with corset-style boning and a coordinating thong ($10) or hot shorts ($10). Meanwhile, the sheer La Madeline baby-doll and G-string set ($36) pulls double duty as both a naughty nightie and a questionable formalwear choice. With today's deal, Groupon holders can also peruse the sale section to capture time-tested designs at marked-down prices.