Olivier Rousteing’s belated birthday bash
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The stars came out in force for Olivier Rousteing’s belated birthday bash in L.A.

Guests at Oliver Rousteing’s Laurel Canyon birthday bash, thrown by Beats, included, from left, Kris Jenner, Kourtney Kardashian, Mary J. Blige, Jada Pinkett Smith, Jaden Smith and Kim Kardashian West.

 (Stefanie Keenan / Getty Images)

Cara Delevingne, left, Omar Johnson and Kate Hudson were among those who made their way to a cabin overlooking the L.A. Basin to fete Olivier Rousteing. 

 (Stefanie Keenan / Getty Images)

Tyga gives a surprise musical performance at the Beats-hosted birthday bash for Balmain Creative Director Olivier Rousteing on Friday. 

 (Stefanie Keenan / Getty Images)

“Empire” star Jussie Smollett, left, poses with Balmain Creative Director Olivier Rousteing on Friday in Los Angeles.

 (Stefanie Keenan / Getty Images)

Choreographer Casper Smart, left, singer Jennifer Lopez and Balmain Creative Director -- and birthday boy -- Olivier Rousteing pose for a shot on Friday.

 (Stefanie Keenan / Getty Images )

From left, Jaime King, Kendall Jenner, Cara Delevingne, Kourtney Kardashian, Kim Kardashian West and Kylie Jenner attend a birthday party for Balmain Creative Director Olivier Rousteing on Friday at a private residence in Laurel Canyon.

 (Stefanie Keenan / Getty Images)

Alessandra Ambrosio takes to the outdoor yard swing during the Beats-hosted bash for Balmain Creative Director Olivier Rousteing on Friday in Los Angeles.

 (Stefanie Keenan / Getty Images)

Kourtney Kardashian, left, takes a selfie with Jaden Smith.

 (Stefanie Keenan / Getty Images)

From left, Matthew Nozska, Olivier Rousteing, Jourdan Dunn and Abbey Lee Kershawn attend Rousteing’s birthday party in Los Angeles on Friday.

 (Stefanie Keenan / Getty Images)

From left, Chanel Iman, Olivier Rousteing, Kim Kardashian West and Kourtney Kardashian pose on a paillette-covered couch high above Los Angeles on Friday at a belated birthday bash for Rousteing, Balmain’s creative director.

 (Stefanie Keenan / Getty Images)
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