Stars Throw a Dinner Party in New Ad!

ET's with Jessica Simpson, Usher, Mariah Carey, Donald Trump and Martha Stewart as they serve up a behind-the-scenes look at their new Macy’s commercial for a good cause!

"After hours, Macy's employees as well as all of us carrying our [celebrity] brands come together and have a dinner," says Usher of the spirited ad, which also stars Queen Latifah, Tommy Hilfiger and Emeril Lagasse.

It's the newest commerical from Macy's and "Feeding America" for the "Come Together" campaign to help end hunger.