The Biggest Loser season 6 winner Michelle Aguilar is sharing her positive experience working with trainer Jillian Michaels. "When I look back on my time on The Biggest Loser, I can't help but smile," Aguilar wrote via Instagram on Tuesday, August 19. "Yes, it was hard work - early mornings, tough workouts and plenty of sweat. But it was also filled with laughter, breakthroughs and moments that changed my life forever." In 2008, Aguilar signed up for the NBC reality show when she was 26 and competed alongside her mom, Renee Wilson.