the "do it do it chu its true true its you" is an all line but since it sounds like krystal or krystal leading i just put it as krystal leading...but anyways yesss probably one of my favorite songs from them

Members + Color Codes

Victoria (Pink)
Amber (Light Blue)
Luna (Green)
Sulli (Purple)
Krystal (Yellow/Gold)

My Bias: Sulli, Krystal
Release Date: November 4, 2009

Translation Source 1: https://colorcodedlyrics.com/2010/07/05/fx-chu_e2_99_a5-color-coded-lyrics/
Translation Source 2: https://kimchicolorcodedlyrics.wordpress.com/2016/09/23/fx-에프엑스-chu♡-츄♡-hangul-romanization-translation/