Louis Vuitton’s East End foray dazzles with premier merchandise from Hamptons-themed exclusives to “LV by the Pool” picks for men, women and home. For its second summer here, Prada reinvented its store with blue and ivory stripes and a white neon logo to shop men’s and women’s collections, plus exclusives. Derek Lam 10 Crosby’s inaugural boutique also debuted down the street. 1 Main Street, East Hampton, N.Y., 11937. 2 Newtown Lane, East Hampton, N.Y., 11937. 20 Newtown Lane, East Hampton, N.Y., 11937.