Oprah Winfrey: Jennifer Hudson has ‘Skinny-fied’ Herself

A slim and trim Jennifer Hudson joined Oprah Winfrey, Gayle King and Dr. Oz to celebrate the 10th anniversary of O, The Oprah magazine at the Live Your Best Walk -- and  ET has the reactions to Hudson's sleek physique.

Oprah called up Hudson onstage to sing and said the new mom had "skinny-fied herself." Dr. Oz also commented on Hudson's transformation, telling ET, "I always thought Jennifer was hot, but she's really hot now. She's a beautiful woman, not just on the outside but on the inside." Hudson is the newest spokesperson for the weight loss program Weight Watchers.

Dr. Oz told ET that an estimated 10,000 people showed up for the Live Your Best event. Oprah said of the turnout, "What it means is you have thousands of women and a few men who really do care about making themselves better.