This chapter examines the 2023 Barbie movie through the lenses of political and cognitive theories, particularly focusing on heuristics and groupthink in decision-making. The narrative of the film, which contrasts the fictional Barbie Land with the real world of modern-day Los Angeles, provides a unique framework to explore how misperceptions and cognitive biases shape political and foreign policy decisions. The film's depiction of Barbie and Ken's contrasting experiences in these two realms mirrors common cognitive challenges faced by policymakers when they navigate complex, unfamiliar international environments. Drawing on the theoretical approaches of rational choice, cognitive psychology, and international relations theory, the chapter argues that, like Barbie and Ken, decision-makers often rely on heuristics – mental shortcuts or rules of thumb – that simplify complex scenarios, but these heuristics can lead to inaccurate assessments and flawed conclusions. Additionally, the film's portrayal of group dynamics in Barbie Land, where conformity and a lack of critical alternatives prevail, serves as an example of groupthink – a phenomenon where the desire for unanimity overrides rational decision-making processes and critical evaluation of alternative courses of action. The chapter highlights how both heuristics and groupthink can impact foreign policy decisions, resulting in oversimplified understandings of other nations and the failure to account for key variables in international relations. Through the lens of the Barbie movie, the chapter explores how cognitive limitations and group dynamics influence decision-making processes in the real world of international politics, with implications for how policymakers manage uncertainty and risk in global affairs.