Also known as fat grafting, the experts we spoke with say that this is one of the most popular and effective options. While it’s often combined with other procedures—full-body liposuction, Brazilian butt lift—this type of hip augmentation is commonly done as a stand-alone procedure for patients who want to soften the lateral contour of their gluteus muscles, the so-called hip dips, says Dr. Ruth Celestin, a board-certified plastic surgeon in Riverdale, Georgia. “The fat cells serve to fill this area in and continue the round curvature from the buttocks to the hips,” she explains.