Benjamin Svetkey spent 20 years as a writer and celebrity interviewer for Entertainment Weekly. He spent thousands of hours talking with hundreds of movie stars, more time with Tom Cruise, he says, than with some of his own blood relatives. He got three hours to smoke stinky cigars with Jack Nicholson in the star's Picasso-filled mansion on LA's Mulholland Drive. So what are these world-class celebrities really like? The headline in Los Angeles Magazine says it all: "I Don't Know Jack."