Who portrayed Queen Amidala's daughter Leia Organa in the original "Star Wars" trilogy?

Carrie Fisher

Name the psychological thriller directed by Christopher Nolan starring Leonardo DiCaprio set within multiple dreams? Who sang "Party in the U.S.A."? What lasting peace treaty ended conflicts from Napoleon’s wars, held in Austria in 1814-1815? Which metal is liquid at room temperature? What does LASER stand for?