Real life Barbie doll Valeria Lukyanova undergoes an extreme diet regimen to achieve her tiny waist.

In a translated interview of the human Barbie, Valeria was asked "What do you do to stay in shape?"

"I do a serious workout in the gym three times a week and I run a lot. It is important not to eat for two hours after your work out-just drink liquids. I prefer liquid foods. But don't drink water with your food if you want to have a slim body. The biggest secret is the amount of food I have-they are very small," she answered.

Liquid foods and small servings of food are Valeria's key to her very slim waistline, which measured 19 inches. In her recent photos, Valeria highlights her waist by wearing sexy and skimpy clothes.

The internet celebrity was often criticized because it was speculated that Valeria has undergone surgery to achieve her looks.

However, Valeria denied that she has gone under the knife except for her breast surgery. She said that she achieved her looks through make up and she offered video tutorial to share her secret on how she achieved her Barbie-like appearance.

"Even though people call me Barbie, I never tried to look like a doll. I just like everything beautiful, feminine and refined. It just so happens that dolls are based on the image of refined girls," Lukayonva says in her documentary "Space Barbie".

See the slideshow for the new photos of Barbie look-alike Valeria Lukyanova and her tiny waist.