Designer collaborations are a hot ticket these days, and Kohl's is debuting its first-ever collection with Narciso Rodriguez in its Design Nation series. Inspired by a trip to Istanbul, the line is filled with bold colorblocking and graphic lines. Emma Roberts and Katie Holmes both showed up to celebrate the line in NYC last night. Emma wore a sleek v-neck dress from the collection and told us her must-have piece for Fall — hint, it's spotted! Watch on to see more. On Allison McNamara: Topshop jacket, Madewell top.