When it comes to collaborations, no one does it better than H&M — well, as far as fast-fashion brands go, to say the least. From their highly anticipated H&M x Moschino drop earlier on this year, to their previous designer collab with British scarf designer, Richard Allan, the major retailer is back this time with yet another surprise — and it's with none other than high street giant — Giambattista Valli.