Kris Jenner has publicly praised her plastic surgeon and rejected claims that her recent facelift is 'slipping,' telling listeners on a podcast recorded in Los Angeles that she is 'obsessed' with the doctor behind the reported £80,000 procedure. The 70 year old Kardashian matriarch addressed the rumours during an appearance on daughter Khloé Kardashian's show Khloé in Wonder Land, after a US outlet alleged she was unhappy with the results and 'd…