Determining the single number one best-selling car globally is difficult because different reporting agencies use different methodologies and classifications (e.g., some include trucks and SUVs in their "car" sales figures, while others don't). Also, sales data can vary slightly depending on the reporting period.
However, consistently near the top are models from Toyota, such as the Toyota Corolla and the Toyota RAV4 (depending on whether you are considering only cars or include SUVs). To get the most up-to-date information, you'd need to check recent sales reports from organizations like JATO Dynamics or Focus2Move.
