Talk:Re birthday (song)/@comment-142.136.60.82-20130428152430/@comment-6192846-20130428162828

The official credits for the chorus (although I can only barely hear KAITO in the background during one part) go to Len, Rin, KAITO, MEIKO, and Miku, meaning an Evillious character represented by each Vocaloid is present singing the lyrics in their colored font at some point. For more information, refer to my blog post on the topic to hear the general themes and speculation fans have over the topic.