Miley Cyrus' 15-yr old sister Noah shocks at Kylie Jenner's 18th birthday.

As Kylie has officially entered adulthood, there seems to be a new underage teen queen of raunchy.Miley Cyrus's 15 year old sister, Noah showed up at Kylie Jenner's birthday party in thigh high boots, skinny jeans and a very revealing top.Not forgetting the blue lipstick and blonde extensions..

These youngsters are not smiling..