Some obsessions are contagious. A friend mentioned a long-standing crush on Charlotte Olympia kitty flats and now we’re zooming in on all the pictures of Alexa Chung, Beyoncé, and SJP wearing these—obsessively studying the colors they’ve bought and the many ways they’re wearing them. Our favorite look? It’s a tie between Alexa’s girlish minis and Sarah Jessica’s oversized boyfriend jeans. Either way, this shoe appears to be amazingly versatile—part ballet flat, part smoking slipper. And the color to get looks like classic black velvet—even with pink silk and silver sequin styles in the mix. What do you think? Which pair would you pick and how would you wear them? Check out your eBay options here!