Mila, 35, looked stunning as always in a slinky black Alex Perry dress. Her movie The Spy Who Dumped Me won the award for Best Comedy Movie.
Victoria, 44, showed off her trim figure in a silky white suit, teamed with an ivory camisole and black heels.
Busy, 39, looked elegant and edgy in a black Christian Siriano dress that featured a wild floor length organza skirt with tiers of ruffles.
They were joined at the event by a slew of stars, including Kim Kardashian with sister Khloe and mom Kris Jenner, Gwen Stefani and her boyfriend Blake Shelton, Scarlett Johansson, Allison Janney, Melissa McCarthy, Chrissy Teigen, Sarah Silverman, Camila Mendes, Rita Ora, Christina Hendricks, Mae Whitman, Danai Gurira, Brie Bella and sister Nikki, Shay Mitchell, Lala Kent, Scheana Marie, Terry Crews, Amber Valletta, Kat Graham, JWoww, Angelina Pivarnick, Giuliana Rancic, Sabrina Carpenter, Pom Klementieff, Carson Daly and wife Siri Pinter, Tyga, Johnny Galecki, Courtney Act, Jeannie Mai, Tyler Henry, Erin Lim, and Jason Kennedy.