By Sarah Tetteh Kim Kardashian’s fans have revealed an alarming theory that her ‘face is sliding down’ as they are convinced she has had plastic surgery. The 43-year-old reality TV fave posed at the Balenciaga Womenswear Fall/Winter 2024-2025 showcase at Paris Fashion Week. She looked stunning with a nude palette of make-up and her hair swept back in a ponytail. As she arrived showing off her killer curves in a form-fitting backless lace dress this weekend, fans all said the same thing. They flocked to Reddit convinced something was different with the KUWTK’s legend. One fan wrote alongside a …