Group CNBLUE's "I'm Sorry" has been ranked number 1 on the 2013 Gaon Digital Male Idol chart.

The chart revealed that their song was ranked number 1 from January 2013 to May 2013.

"I'm Sorry" is a self-composed song by leader Jung Yong Hwa for their 4th mini album, Re:BLUE.

They will also release their 6th Japanese single on July 31.

They will also be attending a famous Japan rock festival this August as well.