NBC's "Smash" held a special preview of the series at New York City’s Museum of Modern Art. Stars Megan Hilty, Katharine McPhee and the rest of the cast, along with director Michael Mayer, writer/executive producer Theresa Rebeck, executive producer/composer/co-lyricist Marc Shaiman and executive producer/co-lyricist Scott Wittman were on hand to talk musicals, Broadway and, of course, Marilyn (the subject of “Smash”’s obsession).