Alessandra Ambrosio Sure Knows How to Have a Great Time at a Fashion Party

Alessandra Ambrosio is one busy model — she just spent Fashion Month walking the runway and is now getting ready for another appearance at the Victoria's Secret Fashion Show. But if she gets a party invitation, she's there in her highest heels and her happiest mood, especially if the party is the 30th birthday celebration of one of her best friends, Balmain Creative Director Olivier Rousteing. The Brazilian beauty, in a light beige form-fitting dress, partied in Los Angeles with Olivier and his army, including the Kardashian-Jenners, Jennifer Lopez, and Cara Delevingne. In what is now a tradition, Alessandra smooched the designer for photos, flashing peace signs and having a blast on her night away from her two kids. Keep scrolling to see her have fun at the fashionable get-together, then get Halloween inspiration from her best costumes.