Valeria Lukyanova may be known as a "Human Barbie," but the 28-year-old Ukrainian model insists that she's not all plastic.

In the past, Lukyanova has admitted to getting breast implants. However, she insists that other parts of her body, like her pencil-thin 18-inch waist, are completely natural, reported the Daily Mail. So to prove that she inherited her doll-like physique, the real life Barbie uploaded a video featuring her mother.

In the five-second YouTube video, both the model and her mother stare vacantly into the camera while titling their heads from side to side. However, it's apparent that she inherited her defined features and big blue eyes from her mom.

The caption of the video reads, "In my family, good genes. Do not believe the rumors about plastic surgery. This allowed the gossip from the tabloids."

Last year, Valeria told the Daily Beast that her tiny waist is all natural. "My mother's waist is as narrow as mine -- I inherited that from her," she said.

Back in February, she admitted that she tries to maintain her looks by abstaining from food and water and training herself to live off light and air in a practice known as "Breatharianism."

"In recent weeks, I have not been hungry at all; I'm hoping it's the final stage before I can subsist on air and light alone," she said this year, according to the Daily Mail.

Breatharianism is a cult whose members believe someone can exist on "cosmic micro-food" rather than food and possibly water, according to the International Business Times. However, the practice is criticized as pseudoscience, and several practitioners have reportedly starved to death.

Watch the video below.