Happy happy I'm so happy A-E-I-O minus 'U' Happy happy I'm so happy dadeul al-a neo ppaegu Stop it dajeonghaejiji ma geuleohge us-eojul ttae nog-anaelini-kka Not in the mood to have fun moleuji nae gibun tto ileohge baboga dwae meoliga gojang-i nan deus Sometimes it hurts amuleohjido anh-eun neoleul bol ttaemyeon And I know and I know and I know geunyang chingu boda ga-kka-wojigo sip-eo nan joh-ahandago malhalkka Unhappyhae ibsulman kkaemul-eo Goin' crazy neo ttaem-e Baby mae-il mae-il-i neon moleugessjiman neon jin-jja Stupid I wanna say it now All day neo mollae honjasmal Happy happy I'm so happy A-E-I-O minus 'U' Happy happy I'm so happy dadeul al-a neo ppaegu No way soljighi malhalge amuleohji anhgin neomu pigonhae dugeundugeun geolineun mam deulkiji anhgi nunchido eobsneun neo-ege seo-unhaedo jeoldae ti naeji anhgi (Ooh) Sometimes it hurts ja-kkuman keojyeo ganeun mam-eul bol ttaemyeon And I know and I know and I know geunyang chingu boda ga-kka-wojigo sip-eo nan joh-ahandago malhalkka Unhappyhae balkkeutman balabwa Goin' crazy neo ttaem-e Baby mae-il mae-il-i neon moleugessjiman neon jin-jja Stupid I wanna say it now All day neo mollae honjasmal Happy happy I'm so happy A-E-I-O minus 'U' Happy happy I'm so happy dadeul al-a, neo ppaegu Happy happy I'm so happy A-E-I-O minus 'U' Happy happy I'm so happy ijeneun malhallae Goin' crazy neo ttaem-e Baby mae-il mae-il-i neon moleugessjiman neon jin-jja Stupid I wanna say it now All day neo mollae honjasmal Happy happy I'm so happy A-E-I-O minus 'U' Happy happy I'm so happy dadeul al-a neo ppaegu Happy happy I'm so happy A-E-I-O minus 'U' Happy happy I'm so happy dadeul al-a neo ppaegu