Making for quite the star-studded Presidents' Day soiree, a full slate of Tinseltown's finest converged upon Siren Studios in Hollywood, California on Monday night (February 20).

As for the happenings, "The Descendants" actress Shailene Woodley teamed up with Vanity Fair West Coast Editor Krista Smith to host the Vanity Fair and Juicy Couture sponsored “Vanities” 20th Anniversary party to kick off "Campaign Hollywood" week.