If you have more time then explore the Melon monthly charts during the 2000s.
In fact, from 2007-2009 Bigbang reached #1 on the Melon monthly chart 5 times (5 months) with the following songs:
Lies, Last Farewell (2 months), Haru Haru, Lollipop
Also, check out this thread I made regarding the Cyworld (the biggest music platform in the 2000s) song of the month:
Thread
Cyworld Digital Music Awards - 'Song of the Month' Winners [2006-2013]
Hey guys, I have decided to make a thread about the Cyworld Digital Music Awards.
Cyworld (Korean: 싸이월드) was a South Korean social network service. Cyworld also had its own music selling platform which was the dominant music platform alongside Melon in the 2000s.
The Cyworld Digital Music Awards (Korean: 싸이월드 디지털 뮤직 어워드) was a South Korean music awards ceremony. It was established in 2006 to recognize songs with the largest monthly digital sales on the Cyworld social network service.
This thread…
Cyworld (Korean: 싸이월드) was a South Korean social network service. Cyworld also had its own music selling platform which was the dominant music platform alongside Melon in the 2000s.
The Cyworld Digital Music Awards (Korean: 싸이월드 디지털 뮤직 어워드) was a South Korean music awards ceremony. It was established in 2006 to recognize songs with the largest monthly digital sales on the Cyworld social network service.
This thread…
Bigbang was just insane in the late 2000s