Kate Middleton, Jennifer Hudson, Jennifer Lopez
Credit: Fame Pictures; Jemal Countess/Getty Images; PacificCoastNews

Did you ever wonder what top designers tell their A-list clientele before they grace the red carpet? With New York Fashion Week kicking off today, we caught up with everyone from Jenny Packham to Max Azria to find out! Click through our gallery to learn the fashion advice they share with the stars—and now, you!