Chords for 古巨基 Leo Ku - Old Boy(官方歌詞版)- 電視劇《老男孩》同名主題曲 (). Spark is the smartest and most interesting app to learn and enjoy playing guitar. Spark is an all-around app for beginners and advanced players to learn any song with chords or master new skills with hundreds of lessons and games in Spark.Spark Chords|古巨基 Leo Ku - Old Boy(官方歌詞版)- 電視劇《老男孩》同名主題曲