Who is "BIGBANG" ?!

JP ORICON
20090624 NO.4
20090625 NO.3 7,021
20090626 NO.3 4,686
20090627 NO.3 3,153
20090628 NO.3 1,842
20090629 NO.2 3,895
20090630 NO.3 1,123
-------------------W1 NO.3  26,039
20090701 NO.17
20090702 NO.14
20090703 NO.8
20090704 NO.9
20090705 NO.13
20090706 NO.15
20090707 NO.9
-------------------W2 NO.11  6,528  32,567
20090708 NO.21
20090709 NO.23
20090710 NO.19
20090711 NO.19
20090712 NO.24
20090713 NO.29
20090714 NO.25
-------------------W3 NO.20  3,682  36,249
20090715 NO.44
20090716 NO.－
20090717 NO.－
20090718 NO.－
20090719 NO.33
20090720 NO.36
20090721 NO.34
-------------------W4 NO.47  1,558  37,807
20090722 NO.－
20090723 NO.－
20090724 NO.－
20090725 NO.－
20090726 NO.－
20090727 NO.－
20090728 NO.－
-------------------W5 NO.73  1,305  39,112
-------------------W6 NO.102   759  39,871
-------------------W7 NO.191   365  40,236
-------------------W8 NO.198   316  40,552
-------------------Y1(20081222~20090921) NO.125  40,552
-------------------Y1(20091109) NO.141  40,552

TW 佳佳唱片
20090623-20090629 NO.5
20090630-20090706 NO.8
20090707-20090713 NO.13

TW 五大唱片
20090626-20090702 NO.5
20090703-20090709 NO.9
20090710-20090716 NO.11
20090717-20090723 NO.14

TW G-MUSIC
20090626-20090702 NO.6
20090703-20090709 NO.7
20090710-20090716 NO.11
20090717-20070723 NO.11
20090724-20090730 NO.19