When Topshop announced it would be returning to the catwalk for the first time in seven years this September, few expected that its high-brow revival would be ushered in with a pair of... Joni jeans.

We tend to think of jeans as the basic building blocks of a wardrobe, but some jeans are the life of the party—bold, extravagant, unexpected, and undeniably high-fashion. Houses like Chanel, Dolce & ...