She didn't fly solo though - she was joined by her mum Cindy, dad Rande, and her model brother Presley. That is one ridiculously-looking family.
She also had her model pals in attendance...
Kaia's ad campaign for Marc Jacobs is so cool - the '80s-inspired video was shot by Katie Grand and Hype Williams, and she sports huge hair, a leopard bomber jacket and the newest Marc Jacobs Beauty product: Highliner Matte Gel Eye Crayon, which is what they celebrated at the party last night.
If you's like to try Kaia's exact look, to the Glamour Beauty Festival and head to the Marc Jacobs Beauty stand where their professional make-up artists will be applying a selection of blond, trend-driven eye looks.