I remember the days when layering a low-cut tank top over another low-cut tank top was considered the height of fashion. Despite what was undoubtedly a rigorous workout, Hadid was dressed in her usual effortlessly cool style. The model then layered on a white tank, simple and classic in all but its silhouette. In fact, it's been a decidedly low-cut tank summer. (Image credit: Getty Images)It's a low-cut tank summer, to be sure.