Kelly Rutherford, Kathryn Ireland and more attend an Unforgettable Evening to benefit the Alzheimer's Association hosted by Grey Goose; Patricia Field, Jenni Pulos, and many more honor Greek culture in America at the Gabby Awards; Cheryl Burke and Derek Hough celebrate their birthdays at a private pool party hosted by Cîroc—get caught up on the the weekend's happenings in this edition of Last Night's Parties.