Kim Kardashian: A Tale of Truth and Booty

Voluptuous beauty Kim Kardashian is putting the plastic butt surgery rumors, er, behind her once and for all.

The bootylicious reality star has turned to her family physician to help prove that her rear is 100 percent real. "My sisters have dared me to get a butt X-ray," Kim tells her doc. "I really just want to get it so I can show the whole world." But of course.

25 Interesting Facts About Kim!

Younger sister Khloe put in her two cents and said, "You could just feel her ass up and see if it's real. You're a doctor, you'll know."

Khloe laughed and added, "The fact that Kim is actually laying (sic) on a table and actually getting an X-ray of her ass is, like, iconic. Are you serious?!" Tush tush.

Watch the sisters' wacky visit to the doctor's on "Keeping Up with the Kardashians," on Sunday at 10:00 PM on E!