Few shoe trends are as polarizing as ballet sneakers. Blending the sporty, supportive feel of tennis shoes with the delicate, fashion-forward look of ballet flats, people aren’t sure what to make of this unexpected mix. But there’s one group that just can’t get enough of the divisive footwear: celebrities. A-listers — including Dua Lipa, Bella Hadid and Camila Cabello — are all in on ballet sneakers, pairing the cool-girl shoe with everything from leggings and leather jackets to ruffle blouses and denim. The shoes are effortlessly chic, whether complete with stretchy straps, cherry-red laces o...