Michelle delivered her final remarks as First Lady - making an emotional defense of the nation's diversity and telling her young audience "the country belongs to you".Speaking at the White House during the event to honor school counselors, she said she hoped she had made people proud.She called serving as First Lady "the greatest honor of my life."Barack Obama issued an emotional defense of his vision to Americans facing a moment of anxiety and a dramatic change in leadership.But by the end each was wiping away tears as the crowd embraces one last time.