We love a mini dress for a night out, even in the colder months, and River Island has a gorgeous purple dress that has serious designer vibes. Today's top videosHowever, this stunning Purple 3D Floral Belted Mini Dress from River Island is giving Zimmerman vibes on a budget, with the same feminine frills and florals. Purple 3D Floral Belted Mini Dress (€105). This particular purple River Island dress appears to be a close dupe of the Lucky floral print mini dress Zimmerman - which costs around €700. Lucky floral print mini dress Zimmerman (€691).