It's basically just the same chords throughout the whole song.

Capo on 2nd fret


      D           A
Jigeum naega haneun yaegi
                   Bm
Neol apeuge halji molla
                            G
Ama nal jukdorok miwohage doel kkeoya


      D           A
Naega yejeon gatji antadeon ne mal
                   Bm
Modu teullin mareun aniya
                            G
Nado byeonhaebeorin naega nat seolgimanhae


      D           A
Neomu chakhan neonde neon geudaeroinde Oh
                   Bm
I don't know I don't know
               G
Naega wae ireoneunji

      D           A
Geutorok saranghaenneunde neon yeogi inneunde Oh
      Bm
I don't know
             G
Ije nal chatgo sipeo

      D           A
Baby I'm sorry neowa isseodo nan lonely
                   Bm
Saranghagin naega bujokhanga bwa
                           G
Ireon motnan nal yongseohae

      D           A
I'm sorry ige neowa naui story
                   Bm
Sarangiran naegen gwabunhanga bwa
                            G
Ne gyeote isseodo


      D           A
Baby I'm so lonely lonely lonely lonely lonely
                   Bm
Baby I'm so lonely lonely lonely lonely lonely
                            G
Baby I'm so lonely lonely lonely lonely lonely
Baby I'm so lonely lonely lonely lonely lonely
[CL]
Nega jalmotan ge anya
Naega isanghan geoya
Imi orae jeonbuteo nan junbi haenna bwa ibyeoreul
[Bom]
Jeongmal jalhaejugo sipeonneunde
Hapil sarang apeseoneun wae
Ireoke haneobsi jagajigo oerounji

[Dara]
Neomu chakhan neonde neon geudaeroinde Oh
[CL]
I don't know I don't know
Naega wae ireoneunji
[Dara]
Geutorok saranghaenneunde neon yeogi inneunde Oh
[Bom]
I don't know
[Dara]Ije nal chatgo sipeo

[CL]
Baby I'm sorry neowa isseodo nan lonely
Saranghagin naega bujokhanga bwa
Ireon motnan nal yongseohae
[Minzy]
I'm sorry ige neowa naui story
Sarangiran naegen gwabunhanga bwa
Ne gyeote isseodo

Baby I'm so lonely lonely lonely lonely lonely
Baby I'm so lonely lonely lonely lonely lonely
[CL]
Baby I'm so lonely lonely lonely lonely lonely
Baby I'm so lonely lonely lonely lonely lonely

[Minzy]
Cuz I'm just another girl
I bami werowo nan
[Bom]
Deoneun gyeondil su eobseo good bye
[Dara]
Cuz I'm just another girl
[CL]
Neomuna werowo
[Bom]
Jigeum ne gyeote isseodo baby I'm so lonely

[Minzy]
Baby I'm so lonely lonely lonely lonely lonely
Baby I'm so lonely lonely lonely lonely lonely
[CL]
Baby I'm so lonely lonely lonely lonely lonely
Baby I'm so lonely lonely lonely lonely lonely.

More lyrics: http://www.lyricsmode.com/lyrics/0-9/2ne1/#share