The second law of thermodynamics and the first law of Nelly lyrics hold that ambient heat and clothing have an inverse relationship. Disturb the natural order with today's Groupon: for $30, you get $60 worth of designer apparel at e.Allen Boutique in Murfreesboro.

Trend-savvy buyer Elizabeth Allen stocks her shop with fashionably curated designer threads and boutique jewelry. Inspired by urban fashion, the inventory blends timeless wardrobe staples, such as Frye riding boots, with fashion-forward pieces, including draping blouses from Costa Blanca ($45) and robes held together by thought alone. Stylish, friendly staffers recommend updating denim with a pair of Joe's colored skinny jeans ($158), which come in a spectrum of hues. A stack of rhinestone bracelets from Lenora Dame ($40–$62) can lend a sense of rhythm to a business handshake or springtime style to a cozy Kerisma gray knit tunic ($88). New arrivals regularly filter in, filling the shop with eye candy such as Joy Joy tops, Leona dresses, and French Connection blouses.