Jennifer Hudson, Mischa Barton and other stars attended the Whitney Museum of American Art's Gala and Studio Party Monday night on New York's Madison Avenue, and ET was there! Watch the video to hear Jennifer talk about motherhood and losing her baby weight!

Hudson revealed how she is getting back into shape after giving birth to son David on August 10. She told ET, "The trick is getting back into your old ways. If I could go around eating like I ate while I was pregnant, that'd be the way to go."

Chaired by Penelope Cruz, Donatella Versace and Liz Swig, the black-tie event at the Whitney featured a special performance by Hudson. Sponsored by Versace, it honored Leonard A. Lauder at the home of the world's preeminent collection of modern and contemporary American art.

Watch ET for more highlights from the event!