Balmain creative director Olivier Rousteing was thrown a belated 30th birthday party by Beats by Dre in the Hollywood Hills on October 23. The star-studded event included plenty of top models and celebrities including his recent Paper Magazine cover co-star Jennifer Lopez, Balmain campaign stars Kylie and Kendall Jenner as well as Kate Hudson, Jourdan Dunn, Rosie Huntington-Whiteley and other famous faces. Check out more images from the event below.