Nicole Kidman, Kerry Washington, Charlize Theron, and others in Hollywood attend Variety's 5th Annual Power of Women luncheon; Diane Kruger, Will Ferrell, Rita Wilson, Ed Ruscha and other philanthropic Angelenos attend The Hammer Museum's 11th Annual Gala In The Garden; Ashley Madekwe, Kaley Cuoco, Dianna Agron, Owen Wilson and Alessandra Ambrosio are among the many to hit the field in style at the 4th Annual Veuve Clicquot Polo Classic—get all of this plus much more on the weekend's top events in this edition of Last Night's Parties.