According to PEOPLE mag say  Kardashian’s sister Khloé, who posted a photo on her blog, showing her sister posing with what appeared to be an X-ray. “Hey dolls. The PROOF is in the X-ray. Kim’s ass is 100% real!!!” Khloé Tweeted.

The, ahem, butt of the joke retweeted the post. The things my sisters have me do! Proof baby!” Kim Tweeted.

Kardashian isn’t the first star to turn to modern science to debunk rumors. In 2005, Tyra Banks had an on-air sonogram to prove that her breasts were real.

: People