Some fans claim new photos prove 

 Kourtney Kardashian underwent plastic surgery

Despite her openness about her beauty

 the Kardashians star has consistently denied

denied all plastic surgery rumors

Some fans remain unconvinced

and one shared a wild new theory that

 Kourtney, has gotten a butt lift

The user posted several old photos of the reality star 

 showing off her body in bikinis during her younger years