In the Flemish region of Belgium, "20 Y.O." debuted at number 67 on October 7, 2006, moving to its peak of number 58 the next week, and staying on the charts for five weeks. In contrast, it reached number 22 in the Walloon region of that country. The album entered the French Albums Chart at number 32 in the week dated September 30, 2006, this being its peak. It lasted on the chart for four weeks, felling off the chart on October 21, 2006, at number 175. "20 Y.O." debuted and peaked at number 46 on October 6, 2006 in Germany, next week the album fell to number 96 before falling off the charts. On the Italian Albums Chart it fared better, reaching number 21. In Switzerland, the album debuted and peaked at number 35 on the Swiss Albums Chart and stayed on the charts for four weeks. In the United Kingdom, the album peaked at number 63 on its album chart. In the Netherlands, "20 Y.O." debuted and peaked at number 34, the issue dated September 30, 2006. Almost one month after, it fell out of the chart at number 93. On the European Top 100 Albums, the record reached number 43. The album had sold an estimated 1.5 million copies worldwide.