Friendship and fitness! How do celebrities like Reese Witherspoon, Cameron Diaz, and Nicole Richie stay in shape? By assuming downward dogs, hitting the pavement, and shedding those pounds -- together! Click through to see more stars and their workout buddies.
Kirsten Dunst and Isla Fisher
Better than a Bachelorette party! The stars took their hot bodies to the gym wearing colorful workout gear.