Olivier Rousteing

Her new Balmain collaboration even includes a spiked design.

Stars flock to wherever Balmain goes. And the iconic fashion house's latest celebration was no exception. The brand had a lot to toast to—Balmain's Los Angeles boutique recently opened and its Beats by Dre collaboration was just released this week—thus, Olivier Rousteing partied with his slew of fabulous friends to commemorate the accomplishments. BFF and muse Kim Kardashian West flaunted her toned abs in a crop top and sheer slit skirt, while the man of the night uplifted his signature all-black look with a monochrome striped blazer. The KKW Beauty founder actually had a fashion emergency just moments before bringing the sizzle to the celebration, as she spilled some makeup on her top. Luckily, her makeup artist Rob Scheppy came to the rescue! And the social media queen documented it all on Snapchat. Kardashian West was just one of many stylish stars at the fête. Kerry Washington was a vision in a LWD and Kate Bosworth layered on the glam in an embellished long-sleeve top and '80s-inspired black poof skirt. Nick Carter, Hailee Steinfeld, and Halsey were also in attendance. So how does Rousteing feel about surrounding himself with so many A-list friends? "They are gigantic stars, yes, but I don’t really see them that way. To me, they are just people, artists. I’ll always remember when [Rihanna] told me to just be confident and express myself. So that’s what I’m doing. I want to please my front row, but I also want to please myself and my generation," he told InStyle.  Check out some of our favorite ensembles from the brand's celebration below. —with reporting by Courtney Higgs

We’re about to learn so much more about Kylie Jenner when her new E! reality show Life of Kylie premieres August 6. We can't help but wonder how many things she realized in 2016. In the meantime, though, here’s one new fun fact about her: She loves headphones! On Wednesday, Balmain introduced #BalmainBeats, a new collaboration between the Paris fashion house and—you guessed it—Beats by Dr. Dre. The brand took to Instagram to not only share the announcement of two new custom designs, but also to introduce none other than Kylie Jenner as the face of the campaign. [tiImage img-pos="1" image_style="684xflex" align="left"] “No matter what you’re going through, when you put on a song that you love, and that you just connect with, it can change your whole mood and just lift you up. Even if it’s just for a few minutes…I love that escape music gives us,” Jenner said in a statement. In the promotional imagery and video, the star seems to enter a jungle and a sandy room designed to look like a tropical oasis. The green and tonal brown looks she wears reflect the two styles available, Safari and Khaki. Beats described it as an “Urban Safari.”  “Seeing music and fashion as completely intertwined simply reflects how my generation grew up—we simply cannot conceive of one without a full helping of the other,” Balmain Creative Director Olivier Rousteing said. “The best of music can only be paired to the best in design.” RELATED VIDEO: Kylie Jenner's Beauty Transformation [tiBrightcove_inline videoid="4889044593001"] Scroll down to see the two pairs available—and visit apple.com, balmain.com, and Balmain’s New York and L.A. stores to grab a pair now.

The L'Oréal Paris Fashion Awards Dinner, hosted by Julianne Moore, brought out the best and brightest up-and-comers in the fashion scene. Moore was joined by our latest style muse, the always-elegant Isabelle Huppert (pictured above) as well as our March cover girl Emily Ratajkowski for the night to recognize rising talent in the chicest city in the world. Meanwhile, after Chloé's breathtaking runway presentation, Solange Knowles took the stage stage at the designer's after-party, appropriately dubbed "Chloé Club," giving celebrity and fashionista guests a chance to dance the night away to her soulful voice while sipping on bespoke cocktails. Olivier Rousteing celebrated another successful runway show with his Balmain muses, Winnie Harlow, Jourdan Dunn, Nicki Minaj, and Sara Sampaio at an after-party everyone wished they had scored an invite to. VIDEO: Watch Our Recap of Paris Fashion Week Back in New York City, Jennifer Lopez walked the red carpet for the premiere of season two of her crime show Shades of Blue and Kristen Stewart, along with her fresh buzz cut, made an appearance at the Metrograph for a screening of her new film, Personal Shopper,presented by Ruffino Wines. RELATED: Chloé Announced New Creative Director Natacha Ramsay-Levi Veuve Clicquot kicked off a Carnaval celebration in Miami with the help of Victoria's Secret Angel Adriana Lima. And, halfway around the world, a few other Angels, including Josephine Skriver and Alessandra Ambrosio, celebrated the opening of Victoria's Secret first flagship store in China. Scroll down for the hottest parties this week.

What's picturesque, romantic, and chic all over? The City of Love, my friends. That's where the most insider-y of fashion insiders spent their week for a) the spring 2017 menswear shows b) Paris Couture Fashion Week or c) both. Tilda Swinton lent her sleek, modelesque aesthetic to the camera at a celebration of Berluti Creative Director Haider Ackermann's latest collection for the boys, where the designer looked dapper in a sleek sports jacket and Swinton shone with her signature bold red lip. The word party doesn't start contain a 'B,' but it may as well considering Balmain never fails to host a bash that defines fun. The fashion house's Olivier Rousteing celebrated his collection at El Pompon Magnifico, where he welcomed an exciting mix of notables which included photographer Ellen von Unwerth, model Grace Bol, race car driver Lewis Hamilton, and Sofia Richie. If the boys of Paris were in search of a golden ticket, all treasures lead to Balmain. Of course, we can't forget the world of couture. Following Dior's magnificent runway show, Dior Beauty ambassador Bella Hadid grabbed her troops and spent the evening at Dior's masquerade ball, where she #nailedit in a sheer pastel blue number alongside Kendall Jenner, also in sheer and also sporting a fresh set of micro bangs. The celebrity sightings weren't few at the Sundance Film Festival, where Lily Collins happily promoted To the Bone from one screening to the next. RELATED: 9 Celebrity Hair Makeovers of 2017 Scroll down for the hottest parties of this week.