Conversation so far:
When was Kim Jae-joong first sound track released?
WWW is the first solo studio album recorded by South Korean singer Kim Jaejoong. The album was released on 29 October 2013 by C-JeS Entertainment.
Are there any other interesting aspects about this article?
Born in Gongju, Chungcheongnam-do as Han Jae-joon , he was adopted into the Kim family at a young age.
Did Kim Jae-joong sing for any other sound tracks?
Kim Jae-joong sang Love for the soundtrack of the film Heaven's Postman in which he starred as the male lead.
Did Kim Jae-joong sing with anyone?
Kim Jae-joong used to perform as a member of the Korean pop group JYJ, and was one of the original members of boy band TVXQ.

Question: Were there any other collaborations?
Self-contained rewrite: Were there any other collaborations Kim Jae-joong did?