▁express ive ▁acting ▁established ▁him ▁as ▁a ▁recognized ▁star ▁in ▁Korea ▁as ▁well ▁as ▁the ▁Asian ▁region ▁at ▁large , ▁and ▁he ▁extended ▁his ▁fame ▁by ▁re le asing ▁his ▁debut ▁album ▁Acc ident . ▁His ▁next ▁film ▁Lo vers ' ▁Con cer to ▁( 2 0 0 2 ), ▁a ▁trag ic ▁mel od rama ▁with ▁actress es ▁Son ▁Ye - jin ▁and ▁Lee ▁E un - ju , ▁also ▁proved ▁to ▁be ▁a ▁popular ▁success . ▁ ▁From ▁ 2 0 0 3 , ▁however , ▁Cha ' s ▁casting ▁choices ▁proved ▁to ▁be ▁less ▁inspired . ▁He ▁appeared ▁in ▁three ▁com ed ies ▁-- ▁Cra zy ▁First ▁Love , ▁ ▁Happy ▁E ro ▁Christmas ▁and ▁Two ▁Gu ys ▁— that ▁were ▁widely ▁critic ized ▁by ▁aud ien ces ▁for ▁their ▁weak ▁scripts ▁and ▁lack ▁of ▁cre ativity . ▁He ▁released ▁his ▁second ▁album ▁The ▁Book ▁later ▁that ▁year . ▁ ▁His ▁ 2 0 0 5 ▁films — the ▁relationship ▁film ▁Sad ▁Movie ▁with ▁an ▁all - star ▁ensemble ▁cast , ▁and ▁mel od rama ▁My ▁Girl ▁and ▁I ▁opposite ▁Song ▁H ye - ky o , ▁the ▁re make ▁of ▁Japanese ▁hit ▁film ▁Cry ing ▁Out ▁Love ▁in ▁the ▁Center ▁of ▁the ▁World ▁— w ere ▁box ▁office ▁disappoint ments . ▁ 2 0 0 7 ' s ▁Highway ▁Star , ▁in ▁which ▁he ▁played ▁a ▁mask ed ▁tro t ▁singer , ▁was ▁a ▁moder ate ▁success . ▁ ▁Cha ▁hosted ▁K BS ▁C ool ▁FM ' s ▁Mr