To celebrate Kylie Jenner‘s 20th birthday on Thursday, the Kardashian-Jenner clan threw a surprise party that lasted into the early hours. The birthday girl shared a video on Snapchat featuring a curvy ice sculpture resembling her famous booty. There was also a chocolate fountain, balloons that. It's a stripped down battle of the buns! Here's Justin Bieber (19) live and unclothed during a Thanksgiving serenade to his grandma (left) and Harry the Prince of Wales (28) wearing nothing but the family jewels during a naked billiards party in Vegas (right). Shop the HRC nonprofit store where % of your purchase goes to HRC’s committed work to ending Lesbian Gay Bisexual Transgender discrimination.