Most of us know Kristen Bell as Veronica from the series Veronica Mars. But she also has an on and off again career on the big screen. Most recently, she had a starring role in the film Forgetting Sarah Marshall where she had to wear a bikini during the majority of the film. Because she knew about the bikini-bearing role she decided to get in shape before filming.
From the looks of her, one would think that she was doing a lot of stomach crunches, but what she actually did was practice plenty of boxing