Infinity on High finished the year at number twenty-one on IFPI's list of the "Top 50 Global Best Selling Albums of 2007". "Infinity on High" has shipped over two million copies worldwide. The album also charted inside the top five worldwide, making it the band's most successful and breakthrough album internationally. "Infinity on High" charted all over Europe, debuting at number eight on "Billboard"'s European Albums chart. In Australia, it debuted at its peak of number four on the Australian ARIA Albums Chart. It remained on the Australian chart for a total of fifty weeks, spending its first seven weeks in the top
Infinity on High and all reaching international charts. "Infinity on High" was spurred on by the lead single "This Ain't a Scene, It's an Arms Race", which became the highest charting song for band and their first to chart worldwide. Wentz commented on the band's decision to pick "This Ain't a Scene..." as the first single, saying "There may be other songs on the record that would be bigger radio hits, but this one had the right message." It was sent to radio weeks before its digital release in January 2007; upon digital release the track debuted and peaked at number two on