Kristen Stewart at the Hollywood Foreign Press Announcement

Kristen Stewart teamed up with Simon Baker to announce the Hollywood Foreign Press Association's Cecil B. DeMille Award winner in Beverly Hills today. Kristen wore a gray Bec & Bridge dress for the event, which revealed that Jodie Foster would be the recipient of the prestigious honor at the Golden Globes in January.

It was an early morning for Kristen, who celebrated Halloween at the Hollywood Forever Cemetery with Robert Pattinson last night. They both wore masks for the party, though Kristen later changed into a pink wig. The duo partied with a costumed Katy Perry, but they weren't the only ones that dressed up for the holiday. Jennifer Garner and her family went as characters from Wizard of Oz to trick-or-treat in Malibu while Gwen Stefani took Zuma out for candy in London.