Andrea Pomerantz Lustig is the author of How to Look Expensive and is known around the offices of Glamour as the “Beauty Sleuth,” thanks to the wildly popular beauty advice column and articles she’s written for the magazine for the last decade, as well as her BlackBerry bursting with the hottest beauty pros. She started Glamour.com’s beauty blog and is cherished by Glamour readers for her fresh, original beauty tips, ideas, and solutions. Prior to becoming a contributing editor at Glamour, she was pioneer editor-in-chief at Sephora.com, and before that she spent ten years as beauty and fitness director at Cosmopolitan.