All eyes were on a glowing Mariah Carey during a Jenny Craig event at the Four Seasons in NYC this afternoon. She wore a body-hugging red dress for the appearance, which was hosted by Gayle King. Mariah's been talking about her dramatic weight loss after giving birth to twins Moroccan and Monroe in May, and recently shared that she gained over 70 pounds during her pregnancy. The singer stopped by The Rosie Show yesterday to tell her story and explained that she had a really "tough pregnancy” but that "it was a huge blessing to be able to have the babies." Mariah's also flaunting her abs on the cover of Us Weekly and, inside the issue, talks about the fitness and diet plan that helped get her back in shape.