Email One occupational hazard of being an expert on contemporary art is being unable to enjoy a gallery without mentally pricing the room. "When I'm in a museum," says Amy Cappellazzo, "I have to shut off that part of my brain and make sure I'm in the proper pleasure engagement where I'm just enjoying the objects." She doesn't leave it off for long. The former curator and art adviser -- she helped establish the annual collector frenzy that is Art Basel Miami Beach -- joined Christie's in 2001 and has led the auction house in selling $2.5 billion worth of postwar art in New York alone, including historic sales in 2004 and 2007 that yielded a combined half a billion dollars.