The debate over whether or not Kim's . . . uh . . . rear end is real or surgically enhanced may not be something that the KKW Beauty founder spends a lot of time thinking about these days (we'd imagine she has way better things to do), but in earlier seasons of KUWTK, it was a rumour that she spent a decent amount of time trying to debunk.
In one episode in particular, after reading a tabloid that accused her of getting plastic surgery, Kourtney and Khloé convince her to get an X-ray of her butt to prove her sceptics wrong.