Her firing came after her team lost a challenge to create a Right Guard deodorant print advertisement.
"After last night's fierce struggle between Melissa Rivers, Annie Duke and Brande Roderick, Trump fired Melissa, and Joan stormed out threatening never to return," NBC said in a news release Monday. "In the next episode airing Sunday ... the teams must pull together to write and perform a new jingle for Chicken of the Sea, leaving the two finalists."
Previous "Celebrity Apprentice" winner Piers Morgan is set to interview the remaining contestants and charge them to tell him which two should face off in the finale.
"After Piers puts each celebrity through the wringer, he reports back -- but ultimately it is Trump's decision," NBC said. "With the final celebrities pleading their cases in the boardroom, Trump fires more celebrities and names the finalists."