Jay Z showed off his DJ skills at Kendall Jenner's 818 launch party, attended by Liam Payne, Winston Duke, Jose Andres and more, at the Atlantis Royal Hotel in Dubai. As he performed behind the decks at the bash, which prohibited phones from the room, the 53-year-old rapper kept celebrities from Sports Illustrated Swimsuit model Melissa Wood Tepperberg to TikTok …