NEW YORK, Aug 19, 2010 / — Whether you’re shopping for Back-to-School or just because its Friday and the weekend is coming, Gilt Groupe, the invitation-only online shopping phenomenon is surprising its members with an exclusive Target Designer Sale beginning at 12pm EST Friday, August 20th and lasting through the weekend Prior to availability in Target stores and on Target.com this fall, the virtual pop-up store will offer limited quantities of select styles from three upcoming Target limited-time-only Designer for Target collections, including Tucker for Target (women’s apparel), Mulberry for Target (handbags) and John Derian for Target (home décor). This