Cobalt Dresses

Olivia Munn stopped by David Letterman's NYC studios, but before she headed inside, she posed in her cobalt racerback Raquel Allegra dress ($295) that's sexy up top and ladylike on bottom. The actress cinched her waist with a matching belt for definition and prettied her feet via chunky wooden platform ankle-strap sandals. Longer-hemlined dresses are all the rage these days, but we love that Olivia's choice maintained a bit of sass thanks to the scooped bodice. Re-create Olivia's latest look by shopping this similar cobalt high-low dress from Express ($60) and pairing it with equally chunky platform sandals. Then swap out the heels for flat sandals for a breezy city stroll.

Modern Family actress Ariel Winter is turning out to be quite the stylish one to watch. First she impressed us in her crystal-embellished Kate Spade dress and now she looked just as fabulous while colorblocking a cobalt silk Jay Godfrey dress and pink ankle-strap sandals from Asos ($43, originally $86). The actress hosted a back-to-school daytime Teen Vogue event at Madison in LA, but her ensemble would look equally great at a nighttime soiree. Just pair this similar Kimberly Taylor cobalt dress ($275) with these Diego Dolcini colorblock sandals ($264, originally $660) and you'll definitely stand out from the crowd.