A slew of young Hollywood's A-list came to party with the Keeping Up With the Kardashian
's star as she entered adulthood (though her actual birthday was today
). Naturally, Kylie's BFF, singer Pia Mia
, was there, along with both Hadid sisters, Gigi and Bella
, but she was also joined by Joe Jonas, Chuck Liddell, Sofia Richie, Hailey Baldwin and Nina Dorbev.