Ballet flats will always have a place in our closets, but fashion insiders know there's another shoe design quietly stealing the spotlight. Enter the Mary Jane: a classic footwear style with a modern edge that's now everywhere, including celebrity closets. One A-lister who loves the trend is Katie Holmes who wears the style in fun pops of blue, red and even metallics. Mary Janes work everywhere from coffee runs to city strolls, and with their signature strap detail and polished feel, the flats are an easy upgrade from your everyday shoe.