(Cover) - EN Star Style - Kim Kardashian has had an X-ray to prove her butt is not surgically enhanced.

The reality television star is famed for her stunning looks and enviable curves. Because of her curvaceous rear, there has been constant speculation surrounding whether or not it has been surgically enhanced.

Kim's younger sibling Khlo cleared up the controversy this week after posting an X-ray photo of her sister's famous butt on her Celebuzz blog.

"Hey dolls. The PROOF is in the X-ray. Kim's ass is 100% real!!! (sic)" she wrote on Thursday.

Kim, who has recently become engaged to NBA star Kris Humphries, points to the X-ray evidence in the photo, which proves that there are no enhancements.

The raven-haired beauty wasted no time in confirming the news. The 30-year-old star took to her Twitter page to joke about the lengths she was forced to go to prove her curves are natural.

"Haha! The things my sisters have me do! Proof baby! RT @KhloeKardashian: Kim got a butt X-Ray... bit.ly/ldeCQZ See, it's REAL!!! LOL (sic)", she tweeted.

The photograph was taken during a doctor's visit, which will be aired on the girls' hit TV show Keeping Up with the Kardashians on Sunday. (C) Cover Media