Emergency responders attempted CPR but could not revive her. Burrell, 55, was last seen in good spirits performing improv comedy around 1 a.m. the night before. The medical examiner has yet to release an official cause of death, and there is no suspicion of foul play. Known for hosting “Worst Cooks in America” and other Food Network shows, Burrell built a successful culinary career after graduating from the Culinary Institute of America.