You thought you were so original with that Alice + Olivia sparkly number. Then old Copycat Christy arrived at the party.Avoid looking like a Doublemint twin by making an appointment with the sisters Greemberg. At their newly opened Gg Personal Shopping Showroom, styling vets Alexandra and Miriam select fast-fashion items in small batches (three of each piece).The North Miami Beach storefront carries hard-to-find yet affordable styles ($30-$200) by offbeat brands like Blaque Label, Olive Olivia, Ark & Co., Vintage Havana, and Collective Concepts.The showroom also serves as a community center of sorts for fashiony types: You’ll find a rotating roster of makeup sessions, yoga classes, shopping opportunities, and live music that make it that much easier to ensure your look is your own.Between visits, keep up with the showroom via Facebook, where new inventory is posted every few days. Or call up the traveling boutique (it lives on) and they’ll bring their wares to your next house party at no extra cost.That’s just their style.Gg Personal Shopping Showroom, 2645b Northeast 186th Terrace, North Miami Beach (786-346-9652 or facebook.com). By appointment only.