Behind The Scenes Of Good Morning America: Robin Roberts

July 23, 2012 Updated Jul 23, 2012 at 7:41 AM EDT

By WKBW News

July 23, 2012 Updated Jul 23, 2012 at 7:41 AM EDT

New York City, NY (WKBW) - One of things that struck me most when I met Good Morning America Anchor Robin Roberts is she's even more flawless-looking and stylish in person than she is on television, although she gives credit to the makeup and wardrobe people.

"I did not look like this when I came in at 5:00 a.m., and I will not look like this when I'm done at 9:01. This is 7:00 - 9:00," Roberts told me during a GMA commercial break last week.

Roberts also believes in healthy eating and steering clear of coffee, and she's not above teasing her co-workers who don't even try to compete with her high diet standards. As Roberts and I were talking during the commercial break, news anchor Josh Elliott walked by eating a bowl of strawberry yogurt and cereal. Roberts called him over and made a face of disgust at his breakfast. Roberts and Elliott then laughed.

There is a lot of laughter among this group of GMA hosts. The ease with which they poke fun at each other makes it easy to forget Robin is dealing with a serious health matter.

"We all still go out. We still hang out, but I see the concern in their eyes because when I have the transplant, that's coming, still not sure when that will be, I'll be out for a chunk of time," explains Roberts. She's talking about her upcoming bone marrow transplant. Robin's already survived a public battle with breast cancer, but talking on television about her own personal health is still not easy for her.

"I have to look at the big picture. So many people have signed up to be bone marrow donors. So many people have similar illnesses and it's bringing awareness to that," says Roberts.

"What's been most inspiring to me is watching how Robin's dealt with it, just going to do her job and she just hasn't missed a beat," says Co-Anchor George Stephanopoulos.

Roberts also didn't miss a beat when I pressed her to reveal some secrets about her GMA co-workers. "Come on Ginger, come on now. You caught us in the first half hour. The first half hour we're very serious," says Roberts.

I had a little more success getting secrets out of Elliott.

"Everything you see is not real. He's five feet tall and he's a brunette," says Elliott. Tune into Eyewitness News This Morning on Wednesday to see who Elliott is talking about.