Kim Kardashian's little step sister, Kylie Jenner's friendship with pop star Justin Bieber is on the rise recently despite having a falling out with Bieber's on and off again girlfriend Selena Gomez.Kim Kardashian's little step sister, Kylie Jenner's friendship with pop star Justin Bieber is on the rise recently despite having a falling out with Bieber's on and off again girlfriend Selena Gomez.