Renee Zellweger's timing in this scene is spot on. Richard Gere's charisma oozes from the screen in all its smarmy glory. What he lacks as a singer he makes up for in personality for sure.
My other surprise favorite part of the movie is the reporter Mary Sunshine (what a great name). Played by Christine Baranski, the reporter delivers a play-by-play of the trial at the end. Baranski plays the character as journalist who is out for the most sensational story she can find, and as she reports, her voice captures the scandal of what unfolds in the trial. It's fun to have a woman reporting on murderesses, as Mary Sunshine is also there for other press conferences and at the jail where all the women are awaiting trial. Between Mary Sunshine and Mama (Queen Latifah) the matron of the women's jail, it's clear that women are in control in this story.
Chicago was fun. Visually it certainly deserved an Oscar. And having women in strong roles makes its win even better.