Martha Stewart (aka Prisoner No. 55170-054) began serving her five-month sentence at West Virginia's "Camp Cupcake" Friday morning. According to a prison rep, the domestic diva was subjected to a strip search on arrival and had to squat and cough hard to check for hidden contraband. All they found was a pinch of rosemary, a dash of thyme and dollop of cr&#232me fra&#238che.