Tina Fey on "Mean Girls"
The musical "Mean Girls" opens April 8 on Broadway, and it's a big deal for Tina Fey, the actress-author-comedian who wrote the script for the show based upon her now-classic 2004 movie. "Sunday Morning" host Jane Pauley speaks with Fey, her husband Jeff Richmond (who composed the show's music), and "Saturday Night Live" creator Lorne Michaels, who produced both the movie and the stage show.