All 26 of the briefcase-holding "Deal or No Deal" beauties were hand-picked for their stunning looks and petite figures, pictures of perfection for millions of fans of the show.

Now, two of these game show models, BROOKE and LEYLA, are playing a part in an all-new ET "fat suit" investigation on the streets of New York!

The pair were each rigged with hidden cameras and donned padded suits and latex makeup to look like they were packing on over 300 pounds to see how it feels to live like 66 percent of America -- overweight and often mocked and ostracized by total strangers.

"Physically and emotionally, this was just so hard on me," Brooke tells ET. "I mean, I've never experienced this kind of treatment. I've never been treated this kind of way."

The investigation found the pair walking the unforgiving streets of Manhattan and even attempting one of the most mundane yet painful tasks of daily life -- shopping for food.

The girls endured many hurtful stares, and Brooke was so affected that she couldn't wait to return to her regular physical self.

"I just I don't want to be in this anymore," she said, fighting back tears. "I want to go back to being me. I don't want to be this person. This isn't me and I just I don't like it."

Added Leyla, also choking up, "It really affected us; I knew we were going to get looks, but I mean, the comments and the stares and just the way people avoided us…"

Tomorrow on ET, in part two of our hidden-camera investigation, Brooke and Leyla are in a New York City supermarket, unable to fit down the aisles and frustrated by their own size -- and stunned by their treatment by a Pedicab driver!