And to make the sting of defeat even worse the 39-year-old was blasted by fellow Biggest Loser trainer Cara Castronuova as an embarrassment after her abysmal athletic performance. We all know that TMZ likes to stir things up. And, when one of their photographers caught up with Biggest Loser’s Cara Castronuova a few days ago, they successfully got her to bash her fellow trainer Jillian Michaels. Jillian Michaels received a lot of criticism recently after she failed to do her best at a triathlon, but the worst bashing came at the hands of Cara Castronuova, who spent one season as a trainer on The Biggest Loser. Jillian Michaels didn't just SUCK ASS at the Malibu Triathlon -- she was an EMBARRASSMENT -- so says her former "Biggest Loser" co-star Cara Castronuova. NBC has confirmed new trainers Brett Hoebel and Cara Castronuova will not return for next fall's twelfth season of The Biggest Loser. "Brett and Cara will not be returning next season. Former boxer and gorgeous reality star Cara Castronuova is partnering with Everlast on June 1st to raise funds that help kids lose unhealthy weight by learning the Sweet Science! "I love boxing. I love kids. and now they're taking Us Weekly behind the scenes with the fitness-trainer bodies that sculpt, tone, and slim down the top celebrity bodies. (From left to right: Cara Castronuova, Harley Pasternak, Tracy Anderson, and Gunnar Peterson.) Cara Castronuova, the feisty new female trainer on NBC's The Biggest Loser (Tuesday, 8 ET/PT), has a fighter mentality when it comes to weight loss. "The fighter mentality is you never give up. If you get knocked down, you get up again. Just last month, ExerciseTV announced new projects with trainers, including former Biggest Loser trainer Cara Castronuova and Fernanda Rocha, featured on Real Housewives of Orange County. It is unclear what will happen with those projects. In 2011, season 11 featured Harper and Michaels, as well as trainers Cara Castronuova and Brett Hoebel. Castronuova and Hoebel did not return for additional seasons. The new season premieres Sept. 11 at 8 p.m. on NBC.