Balmain creative director Oliver Rousteing and his #balmainarmy came out in droves on Friday night to celebrate Rousteing's 30th birthday party in the Hollywood Hills. We tracked down the jaw-dropping location, and the house is actually available to rent on Airbnb! Everyone from Kendall Jenner to Jennifer Lopez to Justin Timberlake was in attendance, and everything was well-documented on Instagram, much to our delight. Considering Rousteing's high-profile Balmain x H&M fashion show earlier in the week and this celebrity-friend-filled celebration, we'd say it was a very successful week for the designer.
Scroll down to see the best Instagram photos of the stylish crew at the festivities!