Final answer:
In 'The Cheetah Girls 3, One World,' the characters sing the song 'Circle Game' when they are expressing their frustrations and facing challenges as a group.
Step-by-step explanation:
The name of the song that the characters sing when they are all mad with each other in 'The Cheetah Girls 3, One World' is "Circle Game". This scene is a pivotal moment that expresses the characters' frustrations and challenges they face as a group. In the movie, the song not only captures their emotional state but also highlights the tension between the characters as they strive to understand one another and work through their disagreements.