With what seems like daily announcements of upcoming designer collaborations [2], it's easy to let one slip by you. After all, we've got closets stocked with Isabel Marant for H&M [3], Derek Lam for Kohl's [4], Peter Pilotto for Target [5] — and that's saying nothing of the forthcoming Alexander Wang for H&M [6], Roland Mouret for Banana Republic [7], and Altuzarra for Target [8] lines we're currently waiting on. Think you've seen it all? Put your knowledge to the test!