In Korea , the song debuted at number 4 on the Gaon Digital Chart for the week ending June 25 , 2011 . The following week , " I Am the Best " rose three positions to the number one spot on the chart , becoming the group 's fourth number one single on the Gaon Chart . By the end of 2011 , the song had sold 3.47 million digital copies and was the fourth best-seller of the year in the country . It won the " Song of the Year " award at the 2011 Mnet Asian Music Awards
2011 Mnet Asian Music Awards
2011 Mnet Asian Music Awards
I Am the Best