Inside Kendall Jenner's epic 21st birthday in Hollywood, with a huge guest list including the Kardashian family, Scott Disick, Caitlyn Jenner, Kylie Jenner, Hailey Baldwin, and a bunch more best friends. Kendall Jenner has revealed why she quit Instagram. Picture: The Ellen DeGeneres Show KENDALL Jenner stunned her millions of followers by quitting...