Listen to 你快乐所以我快乐 online. 你快乐所以我快乐 is an Instrumental language song and is sung by Starwin studio. 你快乐所以我快乐, from the album 小提琴 旧日的情怀, was released in the year 2010. The duration of the song is 4:17. Download Instrumental songs online from JioSaavn.