J-lo has it. So does beyonce. Kim Kardashian is famous for it. We're talking about a bigger, rounder butt!

"The idea of having a full, firm butt is something that's gained popularity in recent years," said Adam Rubinstein, M.D., Facs Plastic Surgeon, Miami.

From 2000 to 2008, butt lifts increased 162-percent. Doctor Adam Rubinstein enhances butts with fat grafts. First, he does liposuction.

"And then you use that fat and re-inject it into the buttocks. This is your stuff. We're taking your tissue and using it in your body," said Rubinstein.

Once transferred, the fat creates a rounder, fuller butt -- evident in these before and after pictures.

"The fat that we remove in liposuction and put into the buttocks with transfer should go on and live as long as the patient does," said Rubinstein.

Risks include bleeding and infection.

"Feeling better about how you look, it helps in every way," said Anna Pagani, who had the butt augmentation.

Anna pagani had gastric bypass, and she shed 140 pounds. Today, she's here for her second butt lift.

"It was very good. It gave it a very good shape, you know, made it more even, more rounded," said Pagani.

At almost 50 years old, she says she just wants to be happy in her own skin.

"Losing the weight and then fixing all the problems that were left from the overweight, it just makes me feel better. It makes me feel more confident," said Pagani.

Of course, that confidence comes at a price. Butt lifts range from eight-thousand to about 18-thousand dollars.