Laura Kelly, 27, 5'3", from Melrose, Mass. Before: 196 lb., size 8/10 After: 133 lb., size 4 Total pounds lost: 63 lb. Total sizes lost: 2/3 Laura's wearing: Under Armour Geo Run Tank Top ($27; underarmour.com), Under Armour Fly-By Capri ($38; underarmour.com)...