Michelle Obama to make second appearance on MasterChef Junior.Michelle Obama is coming back for a second guest appearance on "MasterChef Junior!" The former First Lady will be joining the host Gordon Ramsay, in addition to Martha Stewart and the Muppets. Last year, Michelle made her debut on an episode of Barefoot Contessa. Michelle's appearance on cooking shows is no surprise, though. As First Lady, she was a serious advocate of healthy eating as part of her Let’s Move! initiative.