▁as ▁another ▁b - side ▁entitled ▁Game ▁of ▁Love ▁and ▁an ▁instrument al ▁version ▁of ▁Happy ▁B irth day . ▁Happy ▁B irth day ▁is ▁NE WS ▁t enth ▁consecutive ▁number - one ▁single ▁since ▁their ▁debut ▁in ▁ 2 0 0 4 . ▁This ▁single ▁makes ▁them ▁the ▁second ▁group ▁to ▁have ▁this ▁distinction ▁( the ▁other ▁being ▁Kin K i ▁K ids , ▁who ▁currently ▁has ▁twenty - se ven ▁consecutive ▁number - one ▁singles ). ▁ ▁Over view ▁Happy ▁B irth day ▁was ▁written ▁and ▁composed ▁by ▁Japanese ▁H ip - h op ▁artist ▁SE AM O . ▁Happy ▁B irth day ▁reached ▁the ▁number - one ▁spot ▁on ▁both ▁the ▁daily ▁and ▁week ly ▁Or icon ▁charts , ▁s elling ▁ 2 0 1 , 3 0 4 ▁copies ▁in ▁its ▁first ▁week ; ▁just ▁ 3 8 ▁more ▁copies ▁than ▁their ▁previous ▁single ▁Summer ▁Time , ▁which ▁sold ▁ 2 0 1 , 2 6 6 ▁copies ▁in ▁its ▁first ▁week . ▁ ▁Prom otion ▁Happy ▁B irth day ▁is ▁the ▁theme ▁song ▁for ▁K ose ' s ▁Happy ▁Bath ▁Day ▁P reci ous ▁Rose ▁commercial , ▁which ▁features ▁all ▁six - members . ▁ ▁TV ▁performance ▁ ▁September ▁ 2 4 , ▁ 2 0 0 8 ▁- ▁CD TV ▁ 1 5 th ▁An ni versary ▁ ▁September ▁ 2 9 , ▁ 2 0 0 8 ▁- ▁Hey ! ▁Hey ! ▁Hey ! ▁Music ▁Champ ▁ ▁October ▁ 3 , ▁ 2 0 0 8