Celebrity participants include “The Amazing Race’s” Phil Keoghan working at an outdoor gear and apparel retailer, Olympian and Kardashian patriarch Bruce Jenner selling shoes in a high-end boutique, actress Jane Seymour working as an inept home goods store greeter, actor and comedian Cheech Marin behind the counter at party supply store, racing superstar Jeff Gordon selling automotive supplies and the late Larry Hagman offering food samples at a membership warehouse shopping club.