What if you could get six-pack abs without ever doing a single sit-up? It's now possible: a Denver doctor is the first to use a new procedure that reshapes stubborn fat.

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Before and after the surgery

"As I have gotten older, I still work out five times a week. I eat right. I do everything can do," Kari Sellers said. everything including cosmetic surgery. She was the first person in the country to try a procedure called high-definition LipoSelection.

"I wanted it to look like I had abs," Sellers says. "It didn't matter how many sit-ups I did. I just couldn't get my stomach to look like I wanted it to look."

You'd never guess hers aren't abs of steel, but sculpted fat.

"In essence we sculpt, selectively remove fat that we want to remove leaving thin layers behind. Those layers give the appearance of muscular definition," said plastic surgeon Dr. John Millard.

He is the only surgeon in the United States who performs the procedure. He sedates the patient with anesthesia. Ultrasound energy is used to liquefy the fat, then it's sucked out, leaving just enough to mimic muscle. He says it's best for men and women who are not overweight but want to micro-manage their appearance and can be used on the obliques, pectorals, glutes and side of ribs.

"In other words they are not looking to look thinner per se. They are looking to look better," Dr. Millard said.

How did Sellers like her results?

"I am not smaller than I was," she says. "It's just now that I have a waist. You don't have that tight waist problem with your slacks, they all fit nice."

Dr. Millard says the results should last as long as her weight remains the same.

As with all cosmetic surgeries, high-definition LipoSelection has risks. Some include infection, blood clots, fluid loss and damage to the skin or nerves. So far, more than 40 other patients have had it.

Recovery time is about five days to return to work, two weeks to see a difference, and four months to see the final results. It costs between $8,000 and $15,000 and works well for both women and men.