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
Number 1 to Infinity offer Carey a contract. According to "Billboard", many other critics felt that reuniting with Reid is Carey's best chance of re-establishing herself on the charts. In January 2015, Carey announced that she would re-release "#1's" (1998) with an updated version featuring her songs that had in the meantime reached number-one: "Heartbreaker" featuring Jay-Z (1999), "Thank God I Found You" featuring Joe and 98 Degrees (2000), "We Belong Together" (2005), "Don't Forget About Us" (2005/06) and "Touch My Body" (2008). The North American track listing of "#1 to Infinity" features Carey's eighteen US number-one singles on the "Billboard" Hot 100 and